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Head structure

Subclass of:

606 - Surgery

606001000 - INSTRUMENTS

606053000 - Orthopedic instrumentation

606060000 - Internal fixation means

606300000 - Orthopedic fastener

606301000 - Threaded fastener element

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
606308000 Particular shape 81
606306000 Detachable 4
20130030475REVERSIBLE BONE COUPLING DEVICE AND METHOD - A reversible bone coupling device including a first component having a first elongated stem portion for insertion from a first end longitudinally into a surface of a first bone piece, and a second component having a second elongated stem portion for insertion from a second end longitudinally into a surface of a second bone piece, and a connector extending from a second top for coupling with the first component and reversibly locking therein.01-31-2013
20080300638BREAK-OFF SCREW EXTENSIONS - The present invention provides minimally invasive devices and methods for delivering a spinal connector to one or more spinal anchor sites in a patient's spinal column. In one embodiment, a spinal implant and access device is provided that includes a U-shaped receiver member, a bone-engaging member, and an extension member. The U-shaped receiver member can have a recess formed therein that is adapted to seat a spinal connector. The bone-engaging member can extend distally from the receiver member and it can be adapted to engage bone to thereby mate the receiver member to bone. The extension member can extend proximally from the receiver member and it can include a frangible portion formed thereon that is adapted to break when a predetermined force is applied thereto thereby allowing at least a portion of the extension member to be separated from the receiver member.12-04-2008
20100087873Surgical Connectors for Attaching an Elongated Member to a Bone - The present application is directed to connectors for attaching an elongated member to a bone. The connectors may include a receiver that is attached to an anchor. The receiver may include a base and outwardly-extending arms that form a channel to receive the elongated member. The base may include an opening that extends into a receptacle. The opening may include a first section in an inferior side of the receiver, and a cut-out in a lateral side. During attachment, the anchor may be positioned relative to the receiver such that a head of the anchor may be inserted into the first section and a shaft of the anchor may be inserted into a second section. After insertion, the anchor is rotated to move the shaft out of the cut-out while the head remains in the receptacle. A wedge is then attached to the receiver over the cut-out to prevent the anchor from escaping.04-08-2010
20080215099Orthodontic bone screw - A mechanism for separating the driver tip (09-04-2008
Entries
DocumentTitleDate
20130072991SNAP FIT ROD AND FASTENER SYSTEM - Implementations of the present disclosure provide a snap fit rod and fastener system including one or more fasteners for securing one or more rods to secure a spine or other anatomical structure. The fasteners include a fixation shaft, a clamp and a connector. The fixation shaft (for example a pedicle screw) is configured to frictionally engage a bone (vertebra) or other workpiece. The clamp has a pressure responsive portion that defines an opening configured to receive a rod. The connector is configured to connect the clamp to the fixation shaft and exert pressure on the clamp to modify the opening and secure the rod. A bias mechanism, such as a washer spring may be included to urge against the pressure responsive portion and which can be overcome by pressure on the rod for the “snap fit” effect. For additional adjustability, the clamp may be pivotally mounted on the fixation shaft.03-21-2013
20110202094TRANS-POLYAXIAL SCREW - An orthopedic screw, including a threaded shaft defining a longitudinal axis; a head defining a region able to receive at least a portion of a prosthesis, the head being coupled to the shaft such that the head is movably offset from the longitudinal axis in a direction substantially perpendicular to the longitudinal axis; and a spacing element positionable within the head, the spacing element defining a first alignment marker positionable adjacent a second alignment marker defined by the head.08-18-2011
20090149889TORSION CUTTER AND CANNULATED CUTTER FOR CUTTING ORTHOPEDIC FASTENERS - A surgical instrument includes a first component and a second component moveable about an axis relative to the first component. The second component is moveable between a first position and a second position. Movement of the second component from the first position to the second position applies a torsional force to an orthopedic fastener to remove a portion of the orthopedic fastener.06-11-2009
20130030474Bone Screws and Bone Screw Systems - Bone screws, such as polyaxial bone screws, with dilations located between the screw head and the threaded portion of the screw, for use in preserving polyaxial functionality of the screw head and/or to which crosslinks may be coupled.01-31-2013
20110208248POLYAXIAL SCREW ASSEMBLY - A polyaxial screw assembly includes a pedicle screw, a coupling, an insert, and a housing. The pedicle screw includes a shank having a helical thread formed thereon and a head at one end. The coupling is positioned on top the pedicle screw and releasably engages portions of the head. The coupling and pedicle screw are positioned within a distal portion of the housing. The pedicle screw is slid through an opening in the insert and the insert is thread into the distal portion of the housing to retain the coupling and the pedicle screw within the housing. The pedicle screw is rotatable and pivotable relative to the housing. Compressing the coupling within the housing locks the pedicle screw in a desired orientation.08-25-2011
20090198291BONE SCREW - A bone screw and method of inserting a bone screw into a bone is disclosed. In one example, the bone screw includes a tip segment for creating a starter hole in the bone. A pilot segment is located proximally of the tip segment for creating a pilot hole in the bone after creation of the starter hole. The starter hole and pilot hole are created by a longitudinal pushing force exerted on the bone screw by the surgeon. A threaded segment is located proximally of the pilot segment for fixedly securing the bone screw in the bone by the use of a rotational force exerted on the bone screw by the surgeon. A head is located proximally of the threaded segment for allowing the bone screw to affix an implant or other soft tissue to the bone. In one embodiment the implant is a plate.08-06-2009
20110196431CONSTRAINED MOTION BONE SCREW ASSEMBLY - A bone screw assembly includes an anchor portion and a head portion, such as a rod-receiving portion, movably mounted to the anchor portion to allow for controlled angulation between the anchor portion and the head portion. The anchor portion is pivotable in one or more selected directions about an axis relative to the head portion. A restriction member, which may be a rod seat, prevents the anchor portion from pivoting in one or more different directions about another axis relative to the head portion and/or a spinal fixation element received in the head portion. The restriction member may be inserted in the head portion to control direction that the anchor portion pivots relative to the head portion. The restriction member may also serve as a compression member and/or rod seat for seating a spinal rod coupled to the bone screw assembly.08-11-2011
20110196430SPINAL FIXATION ASSEMBLY WITH INTERMEDIATE ELEMENT - A novel locking mechanism including a body and intermediate element and a method for locking the relative positions of a rod and a screw. The intermediate element is adapted to receive a rod and a head of a screw and is located between the rod and the head of the screw. The intermediate element has a non-circular shape such that at least one large non-contact area exists when the intermediate element is in contact with the head of the screw and the locking mechanism is fully engaged. The body is adapted to maintain the orientation of the non-circular intermediate element with respect to the body. The body also has at least one structure defining at least one distinct temporary stopping point for the intermediate element above the final locking position.08-11-2011
20130079830PEDICLE SCREW ASSEMBLY - Disclosed are spinal fusion assemblies for use in skeletal systems. The assembly includes a coupling element that can be coupled to a fixation element, such as, for example, a screw with a head that removably mates with the coupling element. The coupling element and fixation element are configured to be coupled to an elongate stabilizer, such as a rod, that is positioned between a top and a bottom saddle. A compression member, such as a compression nut, is configured to mate with the coupling element and provides a compressive force to the top and bottom saddles to secure the elongate stabilizer therebetween. The top and bottom saddles are movably positioned within the coupling element such that they can gradually reposition and self-align into a secure engagement with the stabilizer as the compression member provides the compressive force.03-28-2013
20130079832BONE SCREW FOR POSITIVE LOCKING BUT FLEXIBLE ENGAGEMENT TO A BONE - A fracture fixation device is described for fixing a bone having a near cortex and a far cortex, comprising a shaft portion configured to span a distance between the near cortex and the far cortex of the bone; a head portion adjoining the shaft portion and providing for engagement of the device with a bone plate, wherein the head portion is integral with the shaft portion; and a threaded front section for engagement of the device with the far cortex of the bone, wherein the device permits motion of the shaft portion relative to the near cortex.03-28-2013
20130079831CRIMPING TOOL - A crimping tool for producing a polyaxial bone anchoring device (03-28-2013
20100036438LOAD-SHARING BONE ANCHOR HAVING A DEFLECTABLE POST WITH A COMPLIANT RING AND METHOD FOR STABILIZATION OF THE SPINE - A dynamic bone anchor for anchoring a spine stabilization assembly which supports the spine while providing for the preservation of spinal motion. The dynamic bone anchor provides load sharing while preserving range of motion and reducing stress exerted upon the bone anchors and spinal anatomy. The dynamic bone anchor includes a deflectable post connected by a ball-joint to a threaded anchor. Deflection of the deflectable post is controlled by a compliant ring. The force/deflection properties of the dynamic bone anchor may be adapted to the anatomy and functional requirements of the patient. The dynamic bone anchor may be used as a component of a dynamic stabilization system which supports the spine while providing for the preservation of spinal motion.02-11-2010
20130035728Orthopedic implant rod reduction tool set and method - A tool set for implanting a rod in a human spine in conjunction with bone screws. The tool set includes a pair of end guide tools that receive opposite ends of the rod in channels and under manipulation by a surgeon facilitate transport of the rod toward the bone screws attached to the guide tools. Intermediate guide tools having guiding pass through slots are utilized to guide intermediate locations along the rod toward associated bone screws. An attachment structure operably connects the guide tools to the bone screws. The guide tools each include a lower guide and advancement structure to allow a closure top with mating structure to be rotated and driven downward against the rod and to cooperate with similar structure in the bone screw to seat and lock the rod therein. A method utilizing the tool set allows a surgeon to percutaneously implant the rod in the patient.02-07-2013
20100004692BONE ANCHOR WITH PLUG MEMBER AND TOOL FOR INSERTING THE PLUG MEMBER INTO THE BONE ANCHOR - A bone anchor includes a shaft having a first end and a second end, a bore extending from the first end to the second end, and a plug member which is insertable into the bore and guidable through the bore for closing the bore at the second end. The bone anchor is suitable for minimally invasive surgery in such a way a guide wire can be guided through the bone anchor and after the bone anchor has been anchored in the bone the plug member is inserted to close the open end of the bone anchor. A bone cement or a pharmaceutical substance can be introduced into the bone anchor.01-07-2010
20100042166SPINAL FIXATION SYSTEM - A fastener assembly for a spinal fixation system that is particularly useful in treatment of pediatric and small-statured patients includes a fastener, an attachment member, and a locking member. The fastener has a lower portion for contacting a bone and an upper portion integral with the lower portion. The upper portion has two open channels. Each channel is configured and dimensioned to receive a portion of a longitudinal or connecting member along its circumference. The attachment member is positionable on the fastener and at least partially covers the channel that receives the longitudinal or connecting member. The locking member is operatively associated with the upper portion of the fastener and secures the attachment member and the longitudinal or connecting member to the fastener.02-18-2010
20100042165Bone anchoring member - A threaded rod or pedicle screw for insertion into the pedicle portion of a vertebra and having at its exposed end a second threaded rod rigidly connected in a generally parallel orientation to the longitudinal axis of the pedicle screw. The second rod being offset from the longitudinal axis of the pedicle screw and having a locking pin or arm and retaining nut for affixing a rod to the pedicle screw substantially over and aligned with the longitudinal axis of the pedicle screw.02-18-2010
20100331896Device for Anchoring a Tissue in a Bone - It is a device (12-30-2010
20100030279LOAD-SHARING BONE ANCHOR HAVING A DEFLECTABLE POST AND AXIAL SPRING AND METHOD FOR DYNAMIC STABILIZATION OF THE SPINE - A dynamic spinal stabilization component which supports the spine while providing for the preservation of spinal motion. The component may be integrated in a bone anchor for implantation in a bone of the spine. The component and bone anchor provide load sharing while preserving range of motion and reducing stress exerted upon the bone anchors and spinal anatomy. The dynamic spinal stabilization component includes a deflectable post connected by a ball-joint to a threaded anchor. Deflection of the deflectable post is controlled by an axially compressible spring. The force/deflection properties of the dynamic bone anchor may be adapted to the anatomy and functional requirements of the patient. The dynamic spinal stabilization component may be used as a component of a dynamic stabilization system which supports the spine while providing for the preservation of spinal motion.02-04-2010
20130046350Polyaxial bone anchor with pop-on shank, shank, friction fit retainer, winged insert and low profile edge lock - A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in an integral receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. A down-loadable compression insert, a down-loadable friction fit split retaining ring having inner and outer tangs and an up-loadable shank upper portion cooperate to provide for pop- or snap-on assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra. The shank and receiver once assembled cannot be disassembled.02-21-2013
20130123858MULTIAXIAL PEDICLE ATTACHMENT DEVICE FOR VERTEBRAL OSTEOSYNTHESIS - A multiaxial pedicle screw for vertebral osteosynthesis, including: a pedicle screw comprising a spherical head having a recess for the rotation of said pedicle screw; a socket that is hinged onto the spherical head of the pedicle screw and is provided with two diametrically opposed side grooves for receiving a connection rod; a tightening means for maintaining the position of the connection rod that is engaged into said socket; and a locking means that is positioned between said spherical head of the pedicle screw and the socket. The locking means is formed of a ring, at least the base or distal portion of which consists of a cold-compactible material having a resilient deformation capacity. Said locking means enables the locking of the socket in a desirable direction relative to the spherical head of the pedicle screw according to the position of the pedicle screw after the anchoring thereof.05-16-2013
20130072992Polyaxial bone anchor with pop-on shank and friction fit retainer with low profile edge lock - A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in an integral receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. A down-loadable compression insert, a down-loadable friction fit split retaining ring having inner and outer tangs and an up-loadable shank upper portion cooperate to provide for pop- or snap-on assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra. The shank and receiver once assembled cannot be disassembled.03-21-2013
20110015683Polyaxial bone screw assembly - A polyaxial bone screw assembly includes a threaded shank body having an upper portion with a capture structure thereon, a retaining and articulating structure, a compression structure and a receiver for holding the capture structure, retaining and articulating structure, compression structure and a rod. The receiver includes arms that define a channel for receiving the rod. The arms have inner surfaces with a discontinuous flange form thereon for mating with a cooperating continuous flange form of a closure structure for capturing the rod within the receiver. The shank capture structure and the retaining and articulating structure are threadably attached and secured to one another with a buttress stop. In operation, the compression structure is disposed within the receiver between the shank upper portion and a rod but presses only upon the retaining and articulating structure. The retaining and articulating structure has an external substantially spherical surface that mates with an internal surface of the receiver, providing a ball joint, enabling the receiver to be disposed at numerous angles relative to the shank body. The shank upper portion includes a tool engagement formation for driving the shank body into bone.01-20-2011
20130060291Spinal Plate - Spinal plates with additional features to improve the stability of the interface between the plate and the underlying bone. A bone plate may include one or more sharp ridges along the periphery of its underside. When attached to bone, the ridge digs into the bone and increases stability. A bone plate may alternatively or additionally include one or more holes for optional spikes, which may be inserted once the plate is attached to the bone. By separating the spikes and including them as an optional component, the plate may enhance stability while reducing or eliminating the chance of the spike injuring the patient. Furthermore, bone screws may incorporate alternating notches and ridges into the head of the screw. The notches and ridges may interface with a set screw, thereby preventing rotation and loosening of the screw.03-07-2013
20130060293Polyaxial bone anchor with pop-on shank and winged insert with lower skirt for engaging a friction fit retainer - A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in an integral receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. A down-loadable compression insert having a sub-structure, a down-loadable friction fit split retaining ring having inner and outer tangs and an up-loadable shank upper portion cooperate to provide for pop- or snap-on assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra. The shank and receiver once assembled cannot be disassembled.03-07-2013
20130060292Bone anchors with longitudinal connecting member engaging inserts and closures for fixation and optional angulation - Polyaxial bone anchors include a retainer for holding a shank within a receiver, the retainer being in at least two discrete pieces and cooperating with a variety of inserts, some of which independently lock the polyaxial mechanism. Polyaxial and mono-axial bone anchor assemblies include pivot and/or pressure inserts or pads that cooperate with longitudinal connecting members to provide a desired degree of continued control of angulation of the longitudinal connecting member in the sagittal plane or to hold the connecting member in place. Pressure pads for deformable rods may also be made from a deformable plastic material.03-07-2013
20090287260Pedicle Screw With a closure device - Pedicle screws with a closure device for receiving and securing a rod made up of a flexible plastic, for stabilization of a vertebral column, comprising a screw-in part, a head part with a U-shaped recess formed by two arms and into which the rod to be held is insertable. The U-shaped recess is closable by means of a locking element. A clamping screw, put into the locking element, presses an insert on the rod and clamps the latter between a first clamping surface and a second clamping surface. The insert is provided with stop faces by means of which the clamping action against the rod, transmitted to the insert by the clamping screw during the clamping step, is limited. An optimal connection between rod and pedicle screw is thereby obtained.11-19-2009
20120226325Fastener Element Retention Feature for Bone Anchors - A bone anchor includes a distal bone engaging portion, a proximal portion extending from the distal bone engaging portion that includes a thread profile, and a mating element that threadingly engages the thread profile of the proximal portion. A retention feature between the mating element and the proximal portion deformably engages at least one of the mating element and the proximal portion to resist the mating element from moving relative to the proximal portion of the bone anchor.09-06-2012
20100298890MONO-PLANAR PEDICLE SCREW METHOD, SYSTEM AND KIT - A pedicle screw assembly (11-25-2010
20130066380TWO STEP LOCKING SCREW ASSEMBLY - A two step locking screw assembly includes a receiving member for receiving a fixation member and an anchor having an enlarged portion and a shank. The enlarged portion of the anchor may be seated in the receiving member. An insert may also extend inside the receiving member. An outer fastener may be positioned in the receiving member. The outer fastener may include a central opening and a pair of ramped flanges. An inner fastener may be disposed inside the central opening of the outer fastener.03-14-2013
20120116463SYSTEM FOR OSTEOSYNTHESIS, IN PARTICULAR FOR VERTEBRAL OSTEOSYNTHESIS - An osteosynthesis system includes a pedicular screw and a bar of longitudinal axis, the screw having a U-shaped head with two branches and a base for defining an inter-branch space in which the bar is received, a screw shank with a bone thread, and elements for blocking the bar in the space and including at least a tab and movement elements for moving the tab relative to the branches in a plane substantially parallel to the axis, the movement elements being arranged so that the tab occupies two positions, a first position where the tab does not co-operate with the bar, and a second position where the tab co-operates with at least one of the branches in such a manner that at least a portion of the tab is situated in the space and applies on the bar a pressure force that is directed towards the base of the U-shape.05-10-2012
20120116462POLYAXIAL BONE SCREW - A polyaxial bone screw includes a shaft, a body member, and a toroidal member. The shaft includes a longitudinal axis and a proximal end with a head having a generally rounded surface. The body member has a bore disposed longitudinally therethrough and a groove defined by a luminal surface of the bore. The toroidal member has an elliptical cross-section with a major axis and disposed within the groove to engage the generally rounded surface of the head at a point of contact.05-10-2012
20080294202Bone Anchor With Locking Cap and Method of Spinal Fixation - A bone anchor (11-27-2008
20110106175Bone Engaging Implant With Adjustment Saddle - A bone anchor assembly is provided, which may be used in cervical, thoracic, lumbar or sacral areas of the spine or other orthopedic locations. The anchor assembly includes a bone anchor, a receiver mounted to the bone anchor, a saddle within the receiver, and an engaging member. The receiver extends along a central longitudinal axis proximally away from the bone anchor. A rod or other elongated connecting element is received in a passage of the receiver in contact with the saddle, and the engaging member engages the connecting element against the saddle, which engages the saddle against the proximal head of the bone anchor in the receiver. The orientation of the saddle in the receiver is adjustable to correspond to the orientation of the connecting element relative to the central longitudinal axis of the receiver.05-05-2011
20120215263EXTENSIBLE PEDICLE SCREW COUPLING DEVICE - An extensible pedicle screw coupling device for holding a spinal rod in the head of a pedicle screw is disclosed. The device is extensible so as to fasten to the rod stably while maintaining fixing power if there is a gap between the vertebra and the rod. The device comprises pedicle screws that are inserted into the vertebrae, and a coupler in which the pedicle screw inserted into the vertebra and a head of the pedicle screw are connected, and the rod is housed therein, and fixes the rod by screw fastening the retainer to a thread formed on the top, and an extending means that can adjust the length so as to correspond to the distance between rod and vertebra is installed on the pedicle screw and the coupler.08-23-2012
20110282401SURGICAL FASTENER WITH PREDETERMINED RESORPTION RATE - A resorbable screw fastener and a method of firing with an applicator capable of applying a surgical fastener to tissue in order to form tissue connection to secure objects to tissue, the fastener including a body portion having a helical thread, a head portion disposed at the proximal end of the body portion. The resorbable screw fastener is 100% resorbed in vivo during a period of time ranging from about 14 days to about one year after implantation.11-17-2011
20110282399Polyaxial bone screw with cam connection and lock and release insert - A polyaxial bone screw assembly includes, a threaded shank body having an integral upper portion receivable in a receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. A retaining member for capturing the shank in the receiver includes a sloping surface for a frictional, press fit, cammed engagement with the shank. A compression insert having a resilient structure provides non-floppy positioning of the shank with respect to the receiver and also independent locking of the shank with respect to the receiver.11-17-2011
20110282400Reverse angled threadform with anti-splay Clearance - A reverse angled threadform with anti-splay clearance includes inner and outer helical threads, each with respective leading stab flanks and trailing load flanks, the load flanks mutually engaging when an inner member with the inner threads is advanced into an outer member with the outer threads. The inner load flanks form acute angles with a helical axis, while the outer load flanks form obtuse angles with the helical axis. The clearance is formed between the stab flanks of the inner and outer threads. On threadforms with root and crest other than angular peaks, such as cylindrical root and crest surfaces, the anti-splay clearance is also formed between the mutually facing root and crest surfaces of the inner and outer threads. The load flanks may be parallel, outwardly diverging, or outwardly converging.11-17-2011
20100185246Screw Locking Systems for Bone Plates - Bone screws have heads which are provided with a hex socket as well as a threaded portion. A screw driver system includes a hex driver and a threaded driver. The screw driver system permits driving the screw through a plate system into a bone until desired compression is obtained. Then the screw is locked to the plate while maintaining the imparted compression.07-22-2010
20110301649Conforming Bone Stabilization Receiver - A receiver for engaging a bone stabilizing element includes a receiver portion connectable to the stabilizing element, and a base portion connectable to a bone of a patient. The base portion may connect to the bone with a bone screw, for example a polyaxial bone screw, and the receiver portion may connect to the stabilizing element, for example a rod, using a set screw. The receiver portion and the base portion are slideably connected to each other, coupled and constrained in relative movement, by overlapping portions. Axial rotation between the receiver portion and the base portion is enabled by changing the relative dimensions of overlapped portions.12-08-2011
20110301651OFFSET MULTIAXIAL OR POLYAXIAL SCREW, SYSTEM AND ASSEMBLY - A capless multiaxial screw fixation assembly, including: a screw having a threaded portion and a screw head portion positioned at one end thereof; and, a retainer having a first end, a second end opposite the first end, and a bore for receiving the screw threaded portion so that the screw head portion is seated therein. At least one of the screw and the retainer is configured such that the retainer is able to pivot about the screw head portion in a non-symmetrical manner.12-08-2011
20110288599Bone Anchors - A bone anchor assembly includes a bone anchor, a receiver member for receiving a spinal fixation element to be coupled to the bone anchor, and a closure mechanism to fix the spinal fixation element with respect to the receiver member. The bone anchor includes a distal shaft having a distal threaded section and a proximal threaded section. The distal threaded section has a first pitch and a first number of thread starts and the proximal threaded section has a second pitch less than the first pitch and a second number of thread starts greater than the first number of thread starts. The distal threaded section and the proximal threaded section have a constant lead.11-24-2011
20110301650ADJSUTABLE BONE ANCHOR ASEMBLY - A medical implant device has in one embodiment a receiver member for receiving an elongated member, a crown member, an anchor member and a retaining member. An embodiment of the receiver member has an axial opening, a transverse channel, a chamber including at least one substantially flat wall, and a groove. An embodiment of the crown member has at least one substantially flat side. An embodiment of the anchor member has a head with at least one substantially flat surface that may be parallel to the anchor member's longitudinal axis, and an anchoring portion. An embodiment of the retaining member is a substantially flat clip. The crown member and anchor member are inserted into the chamber, and the retaining member is inserted into the groove beneath them. The anchor member may be pivoted substantially in one plane with respect to the receiver member until locked.12-08-2011
20080269810Orthopedic Fastener for Stabilization and Fixation - The present invention includes an apparatus, kit and method for providing a bone fixation assembly for attachment to a bone to provide augmented support. The bone fixation assembly includes a screw having a screw head and a threaded shank. A first aperture is positioned about the screw head to receive a first longitudinal member and a first compression member that engages the first aperture to secure the first longitudinal member. The screw head has a second aperture positioned to receive a second longitudinal member and a second compression member that engages the second longitudinal member aperture to secure the second longitudinal member and provide augmented support.10-30-2008
20100211117Open Axle Surgical Implant - A surgical implant engageable by a surgical tool having spaced apart jaws with inward facing tubular protrusions, is provided. The implant includes a body for interfacing with a bone structure. The implant also includes a head connected with the body having spaced apart posts juxtaposed by a stabilization member receiving area. Each post has an outward side face that includes an upper generally vertical surface intersecting with a generally inward directed under surface that in turn intersects with a lower generally vertical surface. The side face has a generally tubular cylindrical indention intersecting the upper vertical surface and the inward directed under surface.08-19-2010
20100211116Orthopedic Anchor Assembly - In an exemplary embodiment, the present invention provides an anchor assembly that can be used for the fixation or fastening of orthopedic devices or instruments to bone tissue. In particular, the present invention preferably provides a variable angle or fixed angle anchor assembly that is able to securely connect the orthopedic device to bone tissue even when there is a variance in the angle and position of the assembly with respect to the device. Furthermore, in an exemplary embodiment, the present invention provides an anchor assembly having a locking mechanism that will quickly and easily lock the anchor assembly with respect to the orthopedic device.08-19-2010
20100036434RESCUE REDUCTION BONE ANCHOR - Systems and methods for reducing spinal stabilization rods. One embodiment provides an instrument including a body (defining a threaded slot for receiving the spinal stabilization rod), an alignment feature, and a flange (for mounting the instrument on a bone anchor), each of which can correspond to portions of the bone anchor. The alignment feature can align the threads of the instrument and bone anchor to form substantially continuous threads. The alignment features can be a pin and a hole oriented radially with respect to the instrument. An actuator can actuate the instrument alignment features toward, or away from, the instrument body. An actuator slot can correspond to the instrument slot. The threads of the instrument slot can include a thread diameter transition portion. In some embodiments, the instrument threads can include an anti-splay feature which mitigates reaction moments arising from the reduction of the spinal stabilization rod.02-11-2010
20110264151BONE FIXATION DEVICE AND METHOD OF VALIDATING ITS PROPER PLACEMENT - A bone fixation device, in particular a pedicle screw, is provided. The device includes an enhanced bone-to-metal interface, while also having electroconductive properties. Also provided are methods of using the bone fixation device and methods of validating proper placement of the device.10-27-2011
20100057137Modular Pedicle Screw System - A modular anchoring device including a threaded shank for anchoring within a vertebra, an intermediate element and a head portion configured to receive and secure a rigid or non-rigid stabilization rod. The threaded shank, the intermediate element and the head portion of the anchoring device are cannulated to permit percutaneous implantation of the device. The intermediate portion is designed to be removable from the threaded shank portion subsequent to implantation of the anchoring device to enable substitution of another intermediate element having different dynamic characteristics.03-04-2010
20100036436LOAD-SHARING BONE ANCHOR HAVING A DURABLE COMPLIANT MEMBER AND METHOD FOR DYNAMIC STABILIZATION OF THE SPINE - A dynamic bone anchor for anchoring a spine stabilization assembly which supports the spine while providing for the preservation of spinal motion. The dynamic bone anchor provides load sharing while preserving range of motion and reducing stress exerted upon the bone anchors and spinal anatomy. The dynamic bone anchor includes a deflectable post connected by a ball-joint to a threaded anchor. Deflection of the deflectable post is controlled by a durability enhanced compliant sleeve. The force/deflection properties of the dynamic bone anchor may be adapted to the anatomy and functional requirements of the patient. The dynamic bone anchor may be used as a component of a dynamic stabilization system which supports the spine while providing for the preservation of spinal motion.02-11-2010
20100036435LOAD-SHARING BONE ANCHOR HAVING A DEFLECTABLE POST AND METHOD FOR DYNAMIC STABILIZATION OF THE SPINE - A dynamic bone anchor for anchoring a spine stabilization assembly which supports the spine while providing for the preservation of spinal motion. The dynamic bone anchor provides load sharing while preserving range of motion and reducing stress exerted upon the bone anchors and spinal anatomy. The dynamic bone anchor includes a deflectable post connected by a ball-joint to a threaded anchor. Deflection of the deflectable post is controlled by a compliant sleeve. The force/deflection properties of the dynamic bone anchor may be adapted to the anatomy and functional requirements of the patient. The dynamic bone anchor may be used as a component of a dynamic stabilization system which supports the spine while providing for the preservation of spinal motion.02-11-2010
20100280557ORTHOPEDIC FASTENER BLOCKING SYSTEM - In an exemplary embodiment, the present invention provides an orthopedic fastener blocking system that allows for a desirable number of fasteners to be used with an orthopedic device even when the orthopedic device is too small to accommodate a desired number of traditionally located and oriented fasteners or when the accessibility to the device is reduced so that addressing a desired number of traditionally located and oriented fasteners is not possible. The system includes an orthopedic implant and at least first and second fasteners where one of the first and second fasteners prevents the other of the first and second fasteners from uninstalling when the first and second fasteners are in the installed position.11-04-2010
20130218214BONE SCREW HEAD DESIGN - A screw head design, usable for composite material bone screws, in which compression forces applied to the screw head are reduced by one or more of location, size and/or shape of screw head design. In some embodiments, load bearing recesses are located closer to an outer circumference of a screw head than to its central axis.08-22-2013
20120109220Threadform for medical implant closure - A thread located on a cylindrical closure for an open headed medical implant. The thread has a leading surface and a trailing surface that both slope rearwardly from an interior edge to an exterior edge thereof.05-03-2012
20120109219IMPLANT HAVING A SHAFT AND A HOLDING ELEMENT CONNECTED THEREWITH FOR CONNECTING WITH A ROD - An implant is described having a shaft (05-03-2012
20120109218Directional Control for a Multi-Axial Screw Assembly - A multi-axial screw assembly comprises a receiver, a base member, and a crown. The receiver comprises a channel for receiving a rod and an aperture extending from a bottom portion of the receiver. The base member comprises an aperture extending through the base member and an opening on a bottom portion of the base member. The base member is configured to couple to the receiver such that the aperture of the receiver is generally aligned with the aperture of the base member. The base member is rotatable relative to the receiver. The crown is received in the receiver and configured to mate to the base member. The crown has a mating feature configured to couple to the base member such that the crown rotates the base member when the crown is rotated.05-03-2012
20110172719Locking Bone Screw and Spinal Plate System - A bone plate system including a bone plate and a bone screw with an integrated locking mechanism is disclosed. The bone screw includes an elongate member having a threaded shank and a bone screw head that is radially deformable. The integrated locking mechanism sits within the bone screw head and can rotate between a locked condition and an unlocked condition. When the bone screw head is seated within an aperture in the bone plate, rotating the integrated locking mechanism into the locked condition helps to prevent bone screw backout.07-14-2011
20110172718RADIOLUCENT SCREW WITH RADIOPAQUE MARKER - A bone screw includes an elongate shaft extending longitudinally between a proximal end and an opposing distal end The shaft bounds a first passageway at least partially extending between the proximal end and the distal end. The shaft is comprised of a radiolucent material. A core is disposed within the first passageway of the shaft. The core can be comprised of a radiolucent or radiopaque material. A head is either integrally formed with or secured to the proximal end of the shaft or the proximal end of the core. The head can also bound a second passageway that extends through the head and is aligned with the first passageway. The core can also be disposed within the second passageway.07-14-2011
20090240289Orthodontic Anchoring Screw - An orthodontic anchorage screw (09-24-2009
20090182384MATERIAL COMBINATIONS FOR MEDICAL DEVICE IMPLANTS - The present application is directed to embodiments of a pedicle screw assembly to position an elongated member within a patient. The assembly may include a receiver with a channel sized to receive the elongated member and a chamber. The assembly may also include an anchor with a head sized to fit within the chamber. The assembly may include a compression member sized to fit within the chamber and include a first side that contacts against the head and a second side that contacts against the receiver. At least one of the receiver, anchor, and compression member may be constructed of a first material, and at least one of the receiver, anchor, and compression member may be constructed of a second material. The first and second materials may include different moduli of elasticity to prevent deformation of the assembly.07-16-2009
20080249575Anchor Member Locking Features - An implantable medical device may include an implant member having an aperture extending therethrough. An anchor member may be configured to extend through the aperture. A locking ring may be supplied to inhibit back-out of the anchor member.10-09-2008
20110270325POLYAXIAL BOTTOM-LOADING SCREW AND ROD ASSEMBLY - An anchor assembly for use in spinal fixation to interconnect a longitudinal spinal rod, which is integrally formed with a body of the anchor assembly. The anchor assembly includes a bone anchor, a collet, a body portion, a rod portion, and a locking cap. The anchor assembly is preferably configured so that in use, the bone anchor may be secured to the patient's vertebra prior to being received within the body portion. The anchor assembly enables a surgeon to implant the bone anchor without the body portion to maximize visibility and access around the anchoring site. Once the bone anchor has been secured to the patient's vertebra, the rod portion may be inserted into the rod-receiving channel of a second bone fixation element having a rod-receiving channel implanted at a second site and the body portion can be snapped-onto the bone anchor.11-03-2011
20090287261Polyaxial bone screw with discontinuous helically wound capture connection - A polyaxial bone screw assembly includes a threaded shank body having an upper capture structure, a head and an open, compressible retainer collar. The capture structure and retainer collar are both threaded for rotatable attachment within a cavity of the head. The head has a U-shaped cradle defining a channel for receiving a spinal fixation rod. The head channel communicates with the cavity and further with a restrictive opening that allows for loading the capture structure into the head but prevents passage of the attached retainer collar out of the head. The open retainer collar may be bottom- or top-loaded by compressing open ends of the ring towards each other, the collar springing back into a rounded shape after insertion in the head. The open collar has an external substantially spherical surface that mates with an internal surface of the head, providing a ball joint, enabling the head to be disposed at an angle relative to the shank body. The threaded capture structure includes a tool engagement formation and gripping surfaces for non-slip engagement by a tool for driving the shank body into bone.11-19-2009
20090299415PEDICULAR PERCUTANEOUS MINIMALLY INVASIVE SCREW - A pedicular percutaneous minimally invasive screw for use in connection with progressive cannulae which allows screws to be installed in a patient without necessarily cutting or destroying ligaments and muscles, the progressive cannulae going from larger to smaller diameters until the point where a perforation is made, through which the pedicular percutaneous screw enters, guided by a fine filament which precisely positions the screw in the location desired. Adjacent screws are connected via a connection bar that unites the two screws and fixes the bones of a patient's column, wherein the connecting bar is attached to the screw by a compression screw, which is threaded on the body itself.12-03-2009
20110270323SURGICAL FASTENER AND ASSOCIATED SYSTEMS AND METHODS - According to one embodiment, a fastener includes a shank defined about a central axis and a head coupled to the shank. The head includes a continuous receptacle circumscribing the central axis. The continuous receptacle includes a radially inner surface that is angled radially inwardly toward the central axis in a head-to-shank direction.11-03-2011
20110270322SURGICAL FASTENER AND ASSOCIATED SYSTEMS AND METHODS - According to one embodiment, a fastener includes a shank and a head coupled to the shank. The shank is concentrically aligned with a central axis of the fastener. The head extends from a proximal end to a distal end and the shank extends from a proximal end adjacent the distal end of the head to a distal end away from the distal end of the head. The head includes a plurality of receptacles each spaced radially outwardly away from the central axis of the fastener. Each fastener has a radially innermost portion that extends radially inwardly toward the central axis in a direction away from the proximal end of the head.11-03-2011
20110208250ADJUSTABLE BONE SCREW ASSEMBLY - A bone screw assembly includes a screw body, including anchor portion and rod-receiving portion, and a rod seat movably mounted in the screw body to allow for controlled angulation between a spinal connection element disposed in the rod seat and the screw body. The rod seat is pivotable in one or more selected directions about one or more axes relative to the screw body. The rod seat may include a first lower rod seat element disposed in a recess of the screw body having a cylindrical bottom surface to facilitate pivoting in a first direction. A second lower rod seat element is stacked on the first lower rod seat element and has a conical bottom surface abutting a top surface of the first lower rod seat element to facilitate pivoting in a second direction.08-25-2011
20110208249BONE ANCHORING DEVICE - A bone anchoring device includes an anchoring element having a head, a receiving portion having a first region adjacent to a second end for receiving the head and a recess which is open towards a first end to form two free legs for receiving a rod. The anchoring device further includes a pressure element configured to couple to the head, a first closure element and a second closure element. The first closure element cooperates with the legs to simultaneously fix the rod in the recess and fix the head in the receiving portion, and the second closure element cooperates with the legs, the second closure element acts on the pressure element and on the rod to independently fix the head in the receiving portion and fix the rod in the recess. The first closure element and the second closure element are interchangeable.08-25-2011
20130218213BONE SCREW INCLUDING A DUAL THREAD CLOSURE MEMBER - A bone screw including a housing including a threaded opening defined between first and second legs extending from a base portion of the housing, and a threaded closure member configured to be threaded into the threaded opening of the housing between the first and second legs to secure a connecting member in a channel of the housing. The threaded closure member includes a first thread and a second thread intertwined with the first thread, and the threaded opening includes a first discontinuous thread and a second discontinuous thread intertwined with the first discontinuous thread.08-22-2013
20130218212Polyaxial bone screw with cam connection and lock and release insert - A polyaxial bone screw assembly includes, a threaded shank body having an integral upper portion receivable in a receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. A retaining member for capturing the shank in the receiver includes a sloping surface for a frictional, press fit, cammed engagement with the shank. A compression insert having a resilient structure provides non-floppy positioning of the shank with respect to the receiver and also independent locking of the shank with respect to the receiver.08-22-2013
20080312701System and Method for Polyaxially Adjustable Bone Anchorage - An implantable bone anchor assembly for fixing an elongated member such as a spinal rod may include a bone anchor, a coupling head configured to receive the bone anchor and the elongated member, and a locking mechanism. The locking mechanism may provide compressive force to simultaneously fix the position of the elongated member and lock out polyaxial rotation of the bone anchor relative to the coupling head. The locking mechanism may include an engagement member with an oblique surface configured to slide along an oblique surface of the coupling head into engagement with the elongated member. The bone anchor may comprise a head portion and a threaded portion which may be coupled with the coupling head and joined together during manufacture. The assembly may further include a pin and/or a collar to retain the bone anchor. The bone anchor may be side-loaded into the coupling head.12-18-2008
20090264937BONE SCREW FOR PROVIDING DYNAMIC TENSION - A bone screw including a head portion, an intermediate portion, and a threaded portion. The intermediate portion further includes a wave-type spring formed therein. In one exemplary embodiment, the wave-type spring is formed to have a lattice structure. In one exemplary embodiment, the wave-type spring of the intermediate portion is formed by laser cutting. By providing a wave-type spring in the intermediate portion of the bone screw of the present invention, the bone screw provides dynamic tension to maintain a bone plate or other orthopedic device in its desired position substantially adjacent a bone.10-22-2009
20080243193Low Profile Pedicle Screw Assembly - A pedicle screw and rod assembly is provided which has a low profile in the final position. The pedicle screw includes a screw having a threaded portion and a head portion. A tulip body is positioned on the head portion of the screw. A tulip saddle is coupled to the tulip body and positioned to retain the tulip assembly on the pedicle screw. Wedge members are inserted in between the tulip body and the tulip saddle, causing the saddle to compress and thereby retain a rod within the tulip assembly. Colored wedge members alert a surgeon as to whether the system is in a locked or unlocked state. The top of the tulip assembly is approximately equal in height to, or lower than the rod itself. This provides a low profile pedicle screw and rod assembly since the rod itself will be the uppermost member of the completed assembly.10-02-2008
20080269809Bottom-loading pedicle screw assembly - A spine screw assembly is adapted to be loaded from a bottom of a receiver member. The spine screw assembly includes a bone fastener with a head having a groove that removably accepts a clip. The clip acts to retain the head of the bone fastener in the receiver member.10-30-2008
20120197315SCREW FOR FIXING VERTEBRA - The present invention relates to a screw for fixing vertebra comprising a cage as a prosthesis which can be extended to be protruded beyond an external diameter of a screw, and improving the drawback from detaching from the spine following surgical procedures.08-02-2012
20110270321Engaging Member With a Cavity-Base for Engaging a Connecting Element to a Bone Anchor - Devices and methods include an anchor assembly engageable to a vertebra and a connecting element positionable through a receiver of the anchor assembly. The assembly includes an engaging member for engaging the connecting element in the receiver. The engaging member includes a base with a cavity that receives a deformed portion the connecting element when the engaging member is securely engaged to the connecting element.11-03-2011
20110270324SYSTEM AND METHOD FOR WIRE-GUIDED PEDICLE SCREW STABILIZATION OF SPINAL VERTEBRAE - An improved system and method for positioning screws and rods to immobilize bones is provided. Specifically, the system and method is optimal for performing transforaminal lumbar interbody fusion (TLIF) and other interbody fusions in the spine. The system involves pedicle screws detachably connected to wires that guide rods down to the screws. The wires are strong, narrow, flexible, adjustable in tension, and easily disconnected from the screws after rod placement via a process such as cutting, radiating, burning, dissolving, etc.. The use of wires to place the rods avoids the conventional bulky tower apparatuses of the prior art while at the same time enhancing the accuracy of placement. One of the preferred methods involves relying upon the natural lordotic curvature of the spine and the narrow diameter of the wires to insert many elements through a single minimally invasive incision.11-03-2011
20120197314PROVISIONAL FIXATION FOR A MULTI-AXIAL SCREW ASSEMBLY - A multi-axial screw assembly comprises a receiver, a base member, a crown and a bone screw. The base member includes an aperture extending through the base member and an opening on a bottom portion of the base member. The base member is rotatable relative to the receiver and has an inner wall extending partially around the aperture. The crown is received in the receiver and configured to mate to the base member. The crown has a projection configured to extend into the opening of the base member. The projection is configured to have an abutting surface. The bone screw is located between the base member and the crown, the bone screw is configured to be provisionally fixed within the receiver by a force between the abutting surface of the projection and the inner wall of the base member.08-02-2012
20110144702IMPLANT DEVICE - An implant and sleeve combination for at least partial insertion into a bone and/or cartilage. The implant includes a lower portion and the sleeve includes a cavity designed to at least partially receive the lower portion of the implant.06-16-2011
20110144701METHODS FOR STABILIZATION OF BONE STRUCTURES - Methods, systems, devices and tools for placing bone stabilization components in a patient are provided. The systems and devices have a reduced number of discrete components that allow placement through small incisions and tubes. More particularly, the present invention is directed to screws for use in systems and methods of treating the spine, which eliminate pain and enable spinal motion, which effectively mimics that of a normally functioning spine. Methods are also provided for installation of the screw and other subject systems.06-16-2011
20120078314Method for selecting and installing a dynamic pedicle screw - A modular dynamic pedicle screw system including anchoring device having a threaded shank for anchoring within a vertebra, an intermediate element and a head portion configured to receive and secure a rigid or non-rigid stabilization rod. The threaded shank, the intermediate element and the head portion of the anchoring device are cannulated to permit percutaneous implantation of the device. The intermediate portion is designed to be removable from the threaded shank portion subsequent to implantation of the anchoring device to enable substitution of another intermediate element having different dynamic characteristics. The dynamic stabilization system includes an adjustable torque limiting device that is interchangeable between a tap device and a screw driver. The torque device provides information relative to the patient's bone quality inter-operatively in order to determine the appropriate modulus of elasticity for the dynamic pedicle screw.03-29-2012
20120078313COMPLIANT IMPLANT - An implant extends along a central axis, and includes first and second members spaced along the central axis. The implant can include a compliant interface. The compliant interface includes a plurality of spring members, the plurality of spring members arranged to space apart the first member from the second member along the central axis.03-29-2012
20090210015BOTTOM MOUNTED PEDICAL SCREW ASSEMBLY AND METHOD OF USE - A bone screw, which can be a pedicle screw, is generally tulip-shaped. A bore in the bottom of the tulip permits a threaded shaft to be partially inserted into the open interior of the tulip. A seat is formed on the threaded shaft and receives the bottom of the tulip, and prevents the threaded shaft from being inserted too far into the tulip. A saddle is positioned in the interior of the tulip and receives the end of the threaded shaft on one end and can include a trough on its opposite face which can receive a rod that connects together two or more such assemblies. A retaining screw threads into the upper interior surface of the tulip to hold the subcomponents together.08-20-2009
20090222051SPS - FB BONE PLATE SCREW FIXATION SYSTEM - The present patent of invention that refers to a bone plate screw fixation. It refers to a system comprising a screw (09-03-2009
20090248088BONE ANCHORING DEVICE - A bone anchoring device includes a bone anchoring section for anchoring in a bone or a vertebrae, a receiving part for receiving a connection element, a connection element which is at least partly made of a flexible material, a fixation element for fixing the connection element in the receiving part, and wherein a sleeve is provided around the connection element in the receiving part.10-01-2009
20090198290Non-Clamping Fastening Mechanism With Anti-Splay Feature - A device for attaching an elongate support member to the spinal column includes a head portion and a fastening member. The head portion may have a U-shaped portion defining a transverse passage therethrough. The passage may be sized to receive a portion of the elongate support member. The head portion may have an opening between a pair of spaced apart arm portions, the arm portions having end surfaces and having inwardly facing threads. The device also may include a fastening member comprising a body portion having threads sized to interface with inwardly facing threads on the head portion, the body portion defining a longitudinal axis. The fastening member also may include a flange portion adjacent the body portion. The flange portion may extend outwardly about the longitudinal axis to define a circular flange perimeter. The flange portion may include a transversely extending protruding portion and an angled protruding portion.08-06-2009
20090192553ANTI-BACKOUT MECHANISM - Methods and devices for locking a fastener in a thru-bore are provided herein. In one exemplary embodiment, a spinal anchor is provided that includes a bone engaging fastener, an anti-backout mechanism, and a locking mechanism. The anti-backout mechanism can be movable between a retracted position in which it is disposed within the fastener and a deployed position in which is extends from the bone engaging fastener. The locking mechanism can be matable to the bone engaging fastener and can be configured to move the anti-backout mechanism from the retracted position to the deployed position. In the deployed position, the anti-backout mechanism can prevent the bone engaging fastener from backing out of a thru-bore in a spinal plate.07-30-2009
20120197312THREAD INTRODUCTION FEATURES FOR AN ORTHOPEDIC IMPLANT - An orthopedic implant including a U-shaped head having a base and first and second legs extending therefrom and spaced apart from one another to define a U-shaped channel. The first and second legs each include a distal end and together define a distal opening in communication with the U-shaped channel. The first and second legs also together define an internal helical thread extending from the distal end toward the base and configured for threading engagement with a lock member. The first leg defines a starter thread turn proximately adjacent the distal end and having a thread profile substantially similar to a thread profile of primary thread turns proximal the starter thread turn. The second leg defines a non-threaded feature proximately adjacent the distal end that removes and is devoid of the starter thread turn. In one embodiment, the non-threaded feature comprises a substantially smooth and non-threaded surface extending proximally from the distal end of the second leg toward the base. In specific embodiments, the non-threaded feature comprises a countersink or a counterbore.08-02-2012
20100160977Low Profile Dual Locking Fixation System and Offset Anchor Member - A coupling device for securing an elongate member to the spine is provided. The coupling device comprises a compressible inner member that secures an anchor member therein when the inner member is axially shifted within an outer member. The elongate member is retained within the device by an axially inserted locking member, and may be secured independently of the anchor member. The coupling device and anchor may be configured to provide increased angulation of the anchor with respect to the coupling device. For instance, anchor member may have an offset head portion in order to provide normal pivoting of the coupling device when the anchor is attached to bone at an angle.06-24-2010
20100160978BONE SCREW ASSEMBLY WITH NON-UNIFORM MATERIAL - A bone anchor comprises a screw having a threaded shank portion and a head portion, and a housing assembly. At least the threaded shank portion is formed from a titanium or titanium alloy and at least a portion of the housing is formed from a stronger material such as cobalt chrome. The housing assembly has a passageway extending therethrough and a proximal end and a distal end. A saddle is defined within the proximal end of the housing assembly and is configured to retain a portion of a rod therein. The distal end of the housing assembly is configured for securely engaging the head portion of the screw such that the screw is at least one of rotatable and pivotable with respect to the housing.06-24-2010
20100191294MULTIPLE MEMBER INTERCONNECT FOR SURGICAL INSTRUMENT AND ABSORBABLE SCREW FASTENER - An absorbable screw fastener and a method of firing with an applicator capable of applying a surgical fastener to tissue in order to form tissue connection to secure objects to tissue, the fastener including a body portion having a helical thread, a head portion disposed at the proximal end of the body portion. The head portion includes a driver receiving configuration on its outer surface. The screw fastener further includes a cannulated center lumen with an opening extending from the head portion through the longitudinal length of the body portion.07-29-2010
20100262195Polyaxial bone screw with shank articulation pressure insert and method - A polyaxial bone screw assembly includes a threaded shank body having an upper portion, a receiver member or head, a retaining and articulating structure, and a pressure insert disposed between the shank upper portion and a rod. The receiver has a U-shaped cradle defining a channel for receiving a spinal fixation rod and a receiver cavity. The retaining and articulating structure attaches to the shank and rotates with the shank in the cavity during positioning. The pressure insert presses upon the shank upper portion and not the retaining and articulating structure.10-14-2010
20120197313Angled Receiver Wall for Provisionally Fixing a Crown in a Multi-Axial Screw Assembly - A multi-axial screw assembly comprises a bone anchoring member, a receiver, a crown and a snap ring. The receiver member has an aperture extending along a central axis of the receiver member. The aperture receives the bone anchoring member. The receiver member has a cutout on an interior wall of the receiver member. The cutout has an angled wall surface. The angled wall surface extends along the central axis of the receiver. The crown is configured to be received within the receiver member along the central axis of the receiver member. The crown has a groove around the circumference of the crown. The snap ring is configured to be received in the groove of the crown and in the cutout in the receiver member. The snap ring exerts an axial force on the crown when the snap ring abuts the angled wall surface of the receiver member.08-02-2012
20100217333SPLINE DRIVE FOR THREADED POST-TYPE BONE ANCHORS - A threaded bone anchor includes a plurality of recesses formed lengthwise along an exterior cylindrical surface for engagement with a driver instrument through which a user applies clockwise or counterclockwise torque for the insertion or removal of the bone anchor into and from bone. The bone anchor includes a cross-sectional geometry that minimizes the anchor's outer diameter, survives high insertion/removal torque without compromising the anchor's bending/shear strength, and allows a mating clamp to be attached to the entire non-threaded surface, including the recessed portion.08-26-2010
20100217332PEDIATRIC LONG BONE SUPPORT OR FIXATION PLATE - Among other things, there is disclosed an orthopedic plate system for use in supporting or stabilizing long bones in pediatric patients. The plate includes a substantially planar portion for placement along a diaphysis of a long bone and a portion curved out of the plane of the planar portion for placement along at least part of a metaphysis of the long bone. Holes through the plate are provided for screws in both the curved and planar portions, which hold the plate to the long bone. The holes are substantially parallel to each other and substantially perpendicular to the plane of the planar portion. Screws through the holes and into the bone are substantially parallel to an epiphyseal plate of the long bone, so that attachment of the plate to the bone does not adversely affect growth of the long bone.08-26-2010
20100241175PEDICLE SCREWS AND METHODS OF USING THE SAME - Pedicle screws that can include a pedicle screw body, housing, plurality of clamps, rod, and set screw are disclosed herein. The clamps may be positioned side by side inside the lower portion of the housing. When the rod and set screw are provided in the housing, the set screw applies a force on the rod and the rod engages the plurality of clamps, causing the clamps to frictionally engage a head of the pedicle screw between the clamps.09-23-2010
20110112585BONE ANCHORING DEVICE - A bone anchoring device includes a receiving part for receiving a rod, the receiving part having a first bore coaxial with a longitudinal axis and a second bore. The bone anchoring device also includes an anchoring element having a first end for insertion into the bone and a second end positionable within a second bore, the second end having a spherically shaped surface portion. The bone anchoring device further has a locking device provided to the second bore of the receiving part. The locking device protrudes from an inner wall of the second bore and engages with a recessed surface portion of the second end of the anchoring element, such that the anchoring element is pivotable relative to the receiving part around a single axis of rotation. The locking device may comprise pins inserted into through holes formed in the receiving part, which engage with the recessed surface portion of the second end.05-12-2011
20100211115Compression screw assembly, an orthopedic fixation system including a compression screw assembly and method of use - A compression screw assembly includes a first primary member having a threaded leading portion of a first pitch, a smooth middle portion and a threaded trailing portion of a second pitch with the trailing portion residing directly opposite leading portion. The compression screw assembly includes a second threaded screw head member positioned at a distal end having external threads, which are of the same pitch as the plurality of threads of the leading portion, and internal threads of a fourth pitch and dissimilar screw leads from the external threads. The difference in screw leads causes the compression screw member to apply a compressive force on bone fragments when compression screw assembly is inserted into bone fragments.08-19-2010
20120143264BONE ANCHORING DEVICE - A bone anchoring device has an anchoring element, a receiving portion, and a pressure element. The anchoring element includes a shank to be anchored in a bone or a vertebra and a head, the head having an exterior surface with a spherical segment-shaped portion. The shank and the head are separate parts. The receiving portion includes a first end, a second end, a longitudinal axis passing through the two ends, a bore coaxial with the longitudinal axis, and a first region adjacent to the second end for receiving a spherical segment-shaped section of the head. The pressure element exerts pressure on the head to lock the head in the receiving portion. The head has a hollow inner portion to receive a free end portion of the shank and wherein the head and the end portion are formed such that the end portion can be elastically clamped by the head.06-07-2012
20120271364POLYAXIAL SCREWDRIVER FOR A PEDICLE SCREW SYSTEM - A polyaxial screwdriver for inserting a bone screw in a vertebra. A polyaxial bone screw assembly includes a coupling element. When a screw engaging end of the polyaxial screwdriver is lowered on the head of the bone screw, the complimentary surfaces of the screw engaging end of the screwdriver and the head of the screw self-align. A ratchet mechanism formed in the screwdriver provides progressive and automatic locking of the polyaxial screwdriver to the coupling element and prevents the accidental unthreading from the coupling element. In another embodiment of the polyaxial screwdriver, a collet slides over the outside surface of the upper end of the coupling element and locks on to the coupling element. In yet another embodiment of a polyaxial screwdriver, the outer sleeve of the polyaxial screwdriver has a split end that securely engages the coupling element.10-25-2012
20100312288Thread-thru polyaxial pedicle screw system - A thread-thru polyaxial pedicle screw fastening system. The fastening system consists of an anchoring bone screw having threads on one end for use in anchoring to the screw to the spine and a spherical connector on the other end operating as a pivot point about which a U-shaped connecting assembly moves in a polyaxial fashion. The U-shaped connecting assembly, for receipt of a spinal connecting rod, has a biased retainer ring for maintaining a positive tension between the connecting assembly and the anchored screw. The system allows for an improved manufacturing step wherein the threaded shank of a bone screws can be passed through a lower portion of the connecting assembly allowing a variety of bone screw sizes to be used with a common sized connector. A resilient component positioned between the upper retainer ring and the connecting assembly permits relative predetermined placement and retention of the spherical connector relative to the connector assembly due to the force generated by the resilient component and frictional engagement between the surfaces of spherical connector, the retainer ring and the connector assembly. The polyaxial ball and socket can be locked into a fixed position.12-09-2010
20130138160Polyaxial Bone Anchor With Spline Capture Connection And Lower Pressure Insert - A medical implant assembly includes a polyaxial bone anchor having a shank with an upper portion, a receiver, a retainer for holding the shank upper portion in the receiver, a lower compression insert with surfaces for closely receiving an elongate connecting member and a closure structure that may independently engage the lower compression insert to lock the shank with respect to the receiver while selectively not locking the elongate member. Projections or splines of the shank upper portion mate with holding pockets on the retainer. The bone anchor includes a shank upper surface exclusively engaging the lower compression insert that is spaced from the retainer, the retainer and shank being configured for polyaxial motion with respect to the receiver prior to locking.05-30-2013
20130138161Polyaxial bone screw assembly with fixed retaining structure - A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in a receiver and retained within the receiver by a retaining structure in the form of an open ring. The receiver has a U-shaped channel for receiving a spinal fixation rod. The shank upper portion is designed to directly frictionally engage the spinal fixation rod when a closure structure operably urges the rod toward the upper portion, fixing the bone screw shank body in a selected angular orientation with respect to the receiver.05-30-2013
20130144345SELF HOLDING FEATURE FOR A SCREW - A bone fixation device comprises an elongated body extending from a head at a proximal end to a shaft at a distal end along a central longitudinal axis. A slotted opening extends distally into the head by a predetermined distance, the opening defining a spring portion on a lateral side thereof, the spring portion being biased toward the central longitudinal axis and configured to be deflectable away from the central longitudinal axis upon application of a radially expansive force thereto.06-06-2013
20100331898BONE ANCHOR SYSTEM - A bone anchor system anchors a support member to a bone. The bone anchor system comprises a body having a shank adapted for insertion into a hole in the bone. A head is formed on the shank. The head has a support engagement portion adapted to secure the support member to the body. A passage extends from an entry point to an exit point formed in the body. An expandable member has a flexible wall at least partially enclosing an anchoring chamber. The expandable member has an expanded state configured to conform to a cavity in the bone. The anchoring chamber is in fluid communication with the exit point. The expandable member is adapted to expand when a filler material is provided into the anchoring chamber. A portion of the expandable member conforms to the cavity and the body and the support member are substantially anchored to the bone.12-30-2010
20100331897SURGICAL BONE ANCHORING DEVICE AND SPINAL COLUMN FIXATION SYSTEM - A bone anchoring device for a spinal column fixation system includes an anchoring part, a bearing part for mounting at least one connection element thereon and a fixing element. The connection element is adapted for fixing to at least two bone anchoring devices. The anchoring part and the bearing part are mounted on each other, movable relative to each other in an assembly position and fixable relative to each other by the fixing element in an implantation position. The fixing element is of integral construction and has a proximal fixing element section, a distal fixing element section and a predetermined break-off area formed between the proximal and distal fixing element sections. The distal fixing element section has a receptacle for engagement with a tool for transferring the bone anchoring device from the assembly position to the implantation position. The device may be part of an improved spinal column fixation system.12-30-2010
20110015682Variable axis locking mechanism for use in orthopedic implants - A locking mechanism assembly to allow locking of a fastener in an orthopedic implant having its axis at a variable angle relative to the axis of threaded through opening in the implant. The assembly includes a locking insert, having threads which mates with the threads of the through opening and which includes a smooth opening that forms a torque driving recess and an annular flange. A fixator has a head portion with external threads of a harder material than that which forms the through opening so that the threads of the fixator will deform the insert to lock the fixator in a desired position relative to the plate.01-20-2011
20110009910Polyaxial bone screw with helically wound capture connection - A polyaxial bone screw assembly includes a threaded shank body having an upper capture structure, a head and a closed retainer ring. The external capture structure surface and retainer ring internal bore surface are both threaded for rotatable attachment within a cavity of the head. The head has a U-shaped cradle defining a channel for receiving a spinal fixation rod. The head channel communicates with the cavity and further with a restrictive opening that allows for loading the capture structure into the head but prevents passage of the closed retainer ring out of the head. The retainer ring has an external substantially spherical surface that mates with an internal surface of the head, providing a ball joint, enabling the head to be disposed at an angle relative to the shank body. The threaded capture structure or the closed retainer structure includes a tool engagement formation and gripping surfaces for non-slip engagement by a tool for driving the shank body into bone.01-13-2011
20110040337SCREW FOR STABILIZING A BONE FRACTURE AND RELATED KIT - The present invention relates to a screw (02-17-2011
20110040338Polyaxial bone anchor having an open retainer with conical, cylindrical or curvate capture - Polyaxial bone anchor assemblies include a shank having an upper portion and a retainer for holding the shank upper portion in a receiver. The shank upper portion retainer interface is one of conical, cylindrical or curvate and may further include a radial ridge or undercut. The assemblies may include compression inserts.02-17-2011
20110245883Bone Fixation Device - A bone fixation device has a housing on the exposed head of a screw mounted in a bone part from which it projects. A clamp for a fixation rod is mounted on a plate extending from each of opposite lateral sides of the housing in such a manner that allows the plate to rotate about a lateral axis relative to the housing. Each clamp is itself rotatable on its plate about an axis perpendicular to its respective lateral axis, and thereby provides universal movement relative to the housing. Mechanisms are provided for closing the clamps, for locking each plate against rotation about its lateral axis, and blocking each clamp against rotation about its perpendicular axis. In this way rods can be fixed in the clamps and relative to the device. In a particular embodiment, the plates are supported for pivotal movement about their lateral axes, on part-cylindrical surfaces on opposite lateral sides of the housing. Each clamp is mounted on a boss extending through its respective plate to a locking element in a groove beneath the part-cylindrical surfaces. Each clamp has jaws forming a groove for receiving a fixation rod and a clamping element over the rod. The groove depends into the boss such that a rod received in the groove engages the plate at either end of the groove. Activation of the clamping element thereby locks the rod and clamp relative to the plate, and the plate relative to a housing bracket, to prevent any movement of the rod relative to the head of the screw. In an alternative embodiment of the invention the housing on the head of the screw has jaws defining adjacent grooves for receiving fixation rods, and a split ball element for clamping a rod in the groove. Each groove has a central section in which the base has a part-spherical surface, and opposed end sections in which the base has a surface divergent from the central section base. The split ball element has a diametrical bore therethrough, and a clamping element is provided for compressing each ball element to clamp the rod in the ball element, and the element against the part-spherical surface of the groove central section.10-06-2011
20110118793METHODS FOR CONNECTING A LONGITUDINAL MEMBER TO A BONE PORTION - An apparatus (05-19-2011
20110071578METHOD AND APPARATUS FOR SURGICAL FASTENING - A surgical fastener system includes a plurality of fasteners having a throughbore with a non-circular cross section portion. The fasteners may engage with a splined mandrel that passes through the throughbore of the fasteners and rotates the fasteners relative to the mandrel to move at least one of the fasteners along the mandrel, e.g., along the mandrel's longitudinal axis. A distal end of the mandrel may be inserted into a material, such as a tissue, prosthetic or other, and a fastener may be deployed from the distal end of the mandrel while the distal end is positioned in the material.03-24-2011
20110245882ENDOSSEOUS SCREWS AND ORTHOPAEDIC DEVICE TO ASSIST THE RIGID OSTEOSYNTHESIS OF FRACTURES - Endosseous screw (10-06-2011
20110213424 RECEIVING PART FOR RECEIVING A ROD FOR COUPLING THE ROD TO A BONE ANCHORING ELEMENT - A receiving part for receiving a rod for coupling the rod to a bone anchoring element includes a receiving part body including a first end and a second end, and having a substantially U-shaped recess at the first end forming a channel for receiving the rod, and an accommodation space for accommodating a head of the bone anchoring element, the accommodation space having an opening at the second end for introducing the head; and a pressure element arranged at least partially in the accommodation space, the pressure element including a first section having a second recess for receiving the rod, and a second section having a flexible portion to clamp the head, the first section and the second section being fixed relative to each other, wherein said pressure element is insertable from the opening.09-01-2011
20100160979HINGE MOUNTING SYSTEM FOR A SPINAL OSTEOSYNTHESIS DEVICE - The hinge mounting system according to the present invention is constituted of a link connector (06-24-2010
20100217334Press-On Link For Surgical Screws - A coupling assembly that is configured to couple a surgical screw to another coupling assembly and another surgical screw is disclosed. The coupling assembly comprises a body that includes a receptacle configured to receive a head portion of the surgical screw and hold the head portion through an interference fit. The body further includes either a female member, a male member, or both, the female member and the male member configured to mate with a female member and a male member of the another coupling assembly and thereby join the coupling assembly to the another coupling assembly. Embodiments of the coupling assembly provide for adjustment of the distance between the coupling assemblies, as well as misalignment of various axes of the coupling assembly relative to the surgical screw and the male member. Exemplary embodiments provide fewer parts, greater flexibility during the surgical implantation, and a smaller profile than previous coupling mechanisms.08-26-2010
20100036437LOAD-SHARING BONE ANCHOR HAVING A DEFLECTABLE POST WITH A COMPLIANT RING AND METHOD FOR STABILIZATION OF THE SPINE - A dynamic bone anchor for anchoring a spine stabilization assembly which supports the spine while providing for the preservation of spinal motion. The dynamic bone anchor provides load sharing while preserving range of motion and reducing stress exerted upon the bone anchors and spinal anatomy. The dynamic bone anchor includes a deflectable post connected by a ball-joint to a threaded anchor. Deflection of the deflectable post is controlled by a compliant ring. The force/deflection properties of the dynamic bone anchor may be adapted to the anatomy and functional requirements of the patient. The dynamic bone anchor may be used as a component of a dynamic stabilization system which supports the spine while providing for the preservation of spinal motion.02-11-2010
20090312803Bone Plate and Bone Plate Assemblies Including Polyaxial Fasteners - A system for fixation of bone, including a bone plate with an opening comprising threads made of a first material and a fastener with a head at least partially comprising a polymeric material that is softer than the first material. In some embodiments, when the fastener is inserted into the first opening, the threads of the first opening form threads in the polymeric material on the head of the fastener and secure the fastener in place at one of a plurality of possible angles within the first opening. The first opening additionally accepts a fastener with a substantially spherical head for compression of a fracture, or a fastener with a threaded head that engages with the threads of the threaded opening. In some embodiments the first opening includes a substantially frustoconical-shaped top portion. In other embodiments there may be a second opening that is either non-threaded or comprises a plurality of protruding fins.12-17-2009
20110098755Polyaxial bone anchor with non-pivotable retainer and pop-on shank, some with friction fit - A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in a receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. The upper portion expands a retaining member in the receiver cavity to capture the shank upper portion in the receiver. In some embodiment either the retaining member or an insert provide for a friction fit of the shank upper portion in the receiver resulting in non-floppy placement of the shank with respect to the receiver. Some retainers and inserts have a lock-and-release feature. Final locking of the polyaxial mechanism is provided by frictional engagement between the shank upper portion and the retaining member. A pre-assembled receiver, retaining member and optional insert may be popped-on or snapped-on to the shank upper portion prior to or after implantation of the shank into a vertebra.04-28-2011
20110152950SPINAL IMPLANT - This disclosure relates to a spinal implant that can provisionally retain a rod in an assembly head without having to first lock the rod relative to the assembly head. The spinal implant has a clip insert structured to retain the rod in the assembly head. The clip insert has a top portion with a cylindrical opening and extending over the cylindrical opening to cover the connection rod in part when the connection rod is engaged in the clip insert. The top portion is deformable by application of force on the connection rod to engage the connection rod with the clip insert. The clip insert and the assembly head are mechanically decoupled and can be fully received within the assembly head. The mechanical forces to which the assembly head is subjected are not transmitted to the clip insert.06-23-2011
20110152949BONE ANCHORING DEVICE - A bone anchoring device includes an anchoring element including a shaft and a head; a receiving part including a first end and a second end, and having a channel for receiving a rod near the first end, and an accommodation space for accommodating the head near the second end; and a pressure element configured to be located at least partially in the accommodation space and including a flexible portion to clamp the head, wherein the anchoring element is pivotable, and the pressure element is movable inside the accommodation space to lock the head within the pressure element, and wherein a first securing portion on the pressure element and a second securing portion on the receiving part are configured to engage and form a rigid coupling therebetween to prevent removal of the pressure element from the first end of the receiving part.06-23-2011
20110098754Variable Angle Screw Plate Systems - A bone fixation element comprises a shaft extending longitudinally from a proximal end to a distal end and a head connected to the proximal end of the shaft. The head includes a radially outer abutting structure deformable to lockingly engage an inner wall of an opening through a bone plate. Deformation of the abutting structure permits the head to lock the bone fixation element within the opening at any user-selected angle with respect to a central axis of the opening within a permitted range of angulation.04-28-2011
20110098753OSTEOSYNTHETIC CLAMP FOR ATTACHING A BONE ANCHOR TO A SUPPORT ROD - An osteosynthetic clamp is provided for use in attaching a bone anchor (04-28-2011
20110077693TOOL AND COMPONENT EGAGING MECHANISM - A component with an engaging mechanism is disclosed. The component comprises a proximal end and a distal end, wherein the proximal end is configured to cooperate with a tool. The proximal end comprises an outer portion configured for cooperating with the tool and an inner portion configured for cooperating with the tool, wherein the inner portion comprises an engaging element configured for cooperating with a distal portion of the tool so that the engaging element provides a temporary engagement between the component and the distal portion of the tool. A system for engaging a component with a tool also is disclosed.03-31-2011
20120035669Polyaxial bone screw - A polyaxial bone screw assembly includes a threaded shank body having an upper capture structure, a head, a retaining ring and a nut. The external capture structure surface includes a threaded portion and a smooth portion; the smooth portion for slidably mating with the retaining ring and the threaded portion for rotatable attachment to the nut within a cavity of the head. The nut fixes the retaining ring to the shank and also provides a tool engagement formation for driving the shank body into bone.02-09-2012
20120035668Derotation Apparatus For Treating Spinal Irregularities - Treatment of spinal irregularities, including, in one or more embodiments, derotation apparatus and systems that can be used to reduce the rotation of vertebral bodies. Derotation apparatus that may comprise a tube assembly comprising an inner sleeve and an outer sleeve disposed over the inner sleeve. The inner sleeve may have a distal end for attachment to an implant. The tube assembly may further comprise a handle assembly. The tube assembly may further comprise a ball joint assembly disposed between the tube assembly and the handle assembly. The ball joint assembly may comprise a ball joint configured for attachment to a coupling rod. The ball joint assembly further may comprise a reducing extension below the ball joint, the reducing extension being sized to fit in a central bore of the inner sleeve. Orthopedic fixation devices comprising a ball joint are also disclosed.02-09-2012
20120035667LOCKING MECHANISMS FOR PIVOTING BONE ANCHORS - Bone anchors are provided that include a distal shaft for engaging bony structure of a vertebral body and a proximal post pivotably mounted at or near the proximal end of the shaft during implantation of the bone anchor. The bone anchors include a locking member that is engageable to the post and to the shaft to lock the post in a selected angular orientation relative to the shaft.02-09-2012
20110060374Percutaneous Access Devices And Bone Anchor Assemblies - A percutaneous access device includes an inner tube and an outer tube disposed about at least a portion of the inner tube. The outer tube may be sized to span from a skin incision in a patient to a site proximate the spine of the patient. The distal end of the outer tube may be adapted to releasably engage a bone anchor. The inner tube may be adjustable relative to the outer tube between a first position and a second position in which the distal end of the inner tube contacts the bone anchor. A bone anchor assembly includes a bone anchor having a distal bone engaging portion and a receiving member having a recess for receiving a spinal fixation element. The proximal end of the receiving member may have an arcuate groove formed on an exterior surface thereof to facilitate connection of an instrument to the receiving member.03-10-2011
20120303072BONE SCREW SYSTEM WITH CONNECTING PORTION - A bone screw system includes a bone screw and a connecting device for coupling the bone screw to an elongate rod-shaped member. The bone screw has proximal and bone-engaging portions disposed at opposing ends relative to a long axis of the screw. The proximal portion includes a proximal locking feature that extends away from the long axis in a radial direction that is perpendicular to the long axis. The connecting device includes first and second coupling portions at opposing ends relative to the long axis when the coupling device is assembled to the bone screw. The first coupling portion defines an opening for receiving the proximal portion of the bone screw. The second coupling portion is configured to receive the rod-shaped member. The connecting device also includes a restraining feature that frictionally resists rotational motion of the connecting device relative to the bone screw.11-29-2012
20120303071Securing Fasteners - A fastener, for example a bone screw, is sized to pass into an aperture of an implant, for example a bone plate, the fastener having an anchor portion engageable with body tissue, and a head portion formed by an assembly of an insert and an anchor extension. The implant has an aperture with a reduced entry dimension. The insert and anchor extension cooperate to form a reduced dimension passable into the aperture, and an expanded dimension not passable out of the aperture. The size of the assembly is configurable by bending resilient tabs of the anchor extension or the implant, using ramped surfaces, or an expanding diameter of a threadable insert.11-29-2012
20110034957BONE ANCHORING DEVICE - A bone anchoring device includes a bone anchoring element having a shank and a head, a continuous one-piece receiver member, a continuous one-piece first locking element and a second locking element. The receiver member has a first chamber for receiving the head, the head being pivotable in the first chamber, and a second chamber with a channel for receiving the rod. A first locking element fixes the head in the first chamber at an angle, and a second locking element fixes the rod in the second chamber. The receiver member includes a body including both the first chamber and the second chamber. The head and the rod can be inserted and locked independently from each other. The head is fixed by exerting pressure onto it. The bone anchoring device is particularly applicable to the stabilization of the spine in the sacro-iliac and the cervical region.02-10-2011
20120203288SPINAL FIXATION SYSTEM AND SCREWDRIVER TOOL FOR USE WITH THE SAME - A spinal fixation system that utilizes a composite rod to which polyaxial pedicle screw/tulip assemblies are secured, a screwdriver that permits independent threading of a guide member to the tulip and independent threading of the pedicle screw, together with interengaging conical surfaces that true the screwdriver with the pedicle screw. In preferred embodiments, the screwdriver includes an elongated drive shaft having a handle end for imparting rotation and a pedicle screw engaging end, a cylindrical guide member rotatably mounted about said drive shaft, a knob at one end of said guide member for rotating same and a threaded tulip engaging end at the other end thereof. A grip is preferably sleeved around the cylindrical drive member and is longitudinally movable between proximal and distal positions wherein its distal end uncovers and covers, respectively, the screw engaging unit.08-09-2012
20100312289POLYAXIAL SCREW ASSEMBLY - A polyaxial screw assembly includes an internal load dampening mechanism for sharing and dampening loads between at least one screw member and at least one rod member interconnected by the assembly. A method of interconnecting the orthopedic screw with the rod includes dampening with a body member interconnecting the screw to the rod.12-09-2010
20110213425SUPERELASTIC WASHER - Fastening apparatus includes a fastener (09-01-2011
20110251650BONE ANCHORING DEVICE - A bone anchoring device includes an anchoring element having a shaft and a head; a receiving part having a top end, a bottom end, a rod recess, a coaxial bore, and a seat; and a pressure element that is movable within the bore. The head is pivotable with respect to the receiving part and can be fixed at an angle by exerting pressure via the pressure element onto the head. The pressure element has an outer wall portion having a recess or a projection. The receiving part has an inner wall portion having a recess or a projection that cooperates with the recess or projection of the pressure element. The pressure element is configured to assume a first position within the receiving part in which the recess and the projection interact to allow the pressure element to exert a preload onto the head and the head is prevented from freely pivoting but is not locked.10-13-2011
20110160779BONE FIXATION ASSEMBLY - The present invention is directed an anchor assembly for use in spinal fixation to interconnect a longitudinal spinal rod with a patient's vertebra. The anchor assembly preferably includes a bone anchor (06-30-2011
20110054546Polyaxial Pedicle Screw Assembly - A pedicle fixation assembly and method for assembly comprises a screw head comprising a male bulbous end; a bone fixator component comprising a female concave semi-spherical socket for receiving the screw head; a locking saddle pin for engaging the screw head and the bone fixator component; and a blocker for engaging the screw head and for securing the longitudinal member.03-03-2011
20130158609DEVICE FOR COMPRESSION ACROSS FRACTURES - A bone fixation device includes a first element extending from a first head to a first shaft along a first longitudinal axis and having a first channel extending therethrough. The first head rests against a portion of bone adjacent to a first hole through which the first shaft is inserted. A second element includes a second shaft extending along a second longitudinal axis to a second head and having a second channel extending therethrough, the second head resting against a portion of bone adjacent to a second hole through which the second shaft is inserted. The second channel is dimensioned to receive the first shaft therein. A tensioning element is insertable through the first and second channels so that tension applied at a second end thereof imparts a compressive force to the a bone into which the first and second elements are inserted.06-20-2013
20100292739Bone Screws With Improved Locking Mechanisms - Screw mechanisms that securely connect with and contain an elongated support structure are disclosed. Some of these have locking mechanisms as alternatives to conventional set screws. Some of these use ratcheting systems for securing the elongated support structure. Some of these are multi-axial systems. Some of these are alternatives to conventional systems.11-18-2010
20100292740PEDICLE SCREW ASSEMBLY - Disclosed are spinal fusion assemblies for use in skeletal systems. The assembly includes a coupling element that can be coupled to a fixation element, such as, for example, a screw with a head that removably mates with the coupling element. The coupling element and fixation element are configured to be coupled to an elongate stabilizer, such as a rod, that is positioned between a top and a bottom saddle. A compression member, such as a compression nut, is configured to mate with the coupling element and provides a compressive force to the top and bottom saddles to secure the elongate stabilizer therebetween. The top and bottom saddles are movably positioned within the coupling element such that they can gradually reposition and self-align into a secure engagement with the stabilizer as the compression member provides the compressive force.11-18-2010
20110118794SELF DISTRACTING PEDICLE SCREW DISTRACTION DEVICE - A pedicle screw distraction device that includes first and second pedicle screws each including a screw body portion and a ball head. The device also includes first and second screw head portions each including an internal threaded bore where the first screw is inserted in the first screw head portion and the second screw is inserted in the second screw head portion. The device also includes a connector link coupled to the first and second screw head portions where the connector link includes an outer perimeter portion having a slot therein. A spring member is positioned within the connector link between and in contact with the first and second screw head portions. A locking member including a plate and a separating portion is positioned between the screw head portions and an inside wall of the connector link where the separating portion is positioned between the screw head portions.05-19-2011
20110137352BONE SCREW - A bone screw includes a tubular body including a wall having a bone thread in at least a portion of an outer portion of the wall, an open first end and a second end. A plurality of cutting teeth is provided at the open first end, and a head is provided at the second end. An insert in the tubular body is configured to guide a wire therethrough.06-09-2011
20110137353SEGMENTAL ORTHOPEDIC DEVICE FOR SPINAL ELONGATION AND FOR TREATMENT OF SCOLIOSIS - An orthopaedic device to realign bone segments comprises first and second attachment members and a strut or spacer member. The first attachment member is attached to a first rib bone or first transverse process or first lamina of a vertebra. The second attachment member is attached to a second rib bone or second transverse process or second lamina of a vertebra. The strut is positioned between the first and second attachment members. The strut is fixedly or releasably connected to the first and second attachment members to couple the first attachment member to the second attachment member. The strut provides distraction between the first and second rib bones or transverse processes to realign the rib bones. The attachment members comprise a clamp and screw combination.06-09-2011
20100305620MULTIDIRECTIONAL BONE FIXATION ASSEMBLY - Apparatus is provided, including at least one double-jointed bone fixation element. A rod is coupled to the bone fixation element. A rod retaining portion retains the rod in place with respect to the bone fixation element. Other embodiments are also described.12-02-2010
20100305621BONE SCREW ASSEMBLY FOR LIMITED ANGULATION - A limited angulation bone screw assembly adapted to couple a spinal rod with a vertebra including a bone screw, a bushing and a housing. The pedicle screw having a shaft and an upper head portion, the upper head portion comprising a spherical surface with flats disposed on opposite sides of the upper head portion. The bushing comprising a lower rounded surface for mating with the spherical surface and flats of the upper head portion to restrict the angular movement of the bone screw. The coupled bone screw and bushing are inserted into the housing in a first orientation and then rotated to a second orientation to secure the coupled bone screw and bushing to complete the housing.12-02-2010
20110077694BONE ANCHORING DEVICE - A bone anchoring device includes an anchoring element having a shaft and a head; a receiving part for receiving the head and a rod, the receiving part being formed in one piece and having a top end and a bottom end, a bore extending from the top end to the bottom end, an inner wall defined by the bore, a substantially U-shaped channel adjacent to the top end for receiving the rod and a seat adjacent to the bottom end for accommodating the head; a pressure element; and a spring element having a spring force. The anchoring element is inserted from the top end and is pivotable with respect to the receiving part. The pressure element is movable in the bore so as to be able to fix the anchoring element at an angle with respect to the receiving part by exerting pressure onto the head. The spring element acts between the pressure element and the receiving part and allows the pressure element to be introduced from the top end but withstands against removal of the pressure element through the top end.03-31-2011
20100179601Threadless position augmenting mechanism - One aspect relates to augmenting positioning of an originally unsecured attachment element with respect to an originally unsecured bridging element. Another aspect relates to a surgical theater mechanism that can be at least partially fabricated at least partially based on position augmenting a first surgical theater element relative to a second surgical theater element. Yet another aspect relates to controlling positioning of a bony element at least partially by augmenting positioning of an originally unsecured attachment element relative to an originally unsecured bridging element. Still another aspect can relate to a shunt tube configured to be augmented secured with respect to a shunt device, at least partially to configure the shunt device into an operable position.07-15-2010
20110152948TRIPLE LEAD BONE SCREW - A pedicle screw assembly, including: a bone screw having a head portion and a thread portion, wherein the thread portion includes an axial shaft and a triple lead thread disposed about the axial shaft; and a rod retention member selectively coupled to the head portion of the bone screw. Optionally, the triple lead thread includes leads that originate at different points along the axial shaft. Optionally, the triple lead thread includes leads that terminate at different points along the axial shaft. Optionally, the axial shaft includes a first tapering portion proximate a tip of the axial shaft. Optionally, the axial shaft includes a second tapering portion proximate the tip of the axial shaft. Preferably, the second tapering portion tapers more steeply than the first tapering portion. Optionally, the axial shaft includes a reduced diameter portion proximate the head portion. Optionally, the axial shaft includes one or more tapering portions proximate the head portion.06-23-2011
20100030280Upload shank swivel head bone screw spinal implant - A polyaxial bone screw having a bone implantable shank, a head and a retaining ring. The retaining ring includes an outer partial hemispherical surface and an inner bore with radially extending channels and partial capture recesses. The shank includes a bone implantable body with an external helical wound thread and an upwardly extending capture structure. The capture structure includes at least one spline which extends radially outward and has a wedged surface that faces radially outward therefrom. The capture structure operably passes through a central bore of the retaining ring while the spline passes through a suitably shaped channel so that the spline becomes positioned above the head at which time the shank is rotated appropriately and the shank is drawn back downwardly so that the spline engages and seats in the capture recess. The head includes an internal cavity having a spherical shaped surface that mates with the ring surface and has a lower restrictive neck that prevents passage of the ring once the ring is seated in the cavity.02-04-2010
20110218577Low Profile Fastening Assembly - In an exemplary embodiment, the present invention provides a fastener assembly that can be used for the fixation or anchoring of orthopedic devices or instruments to bone tissue. In particular, the present invention preferably provides a low profile variable angle or fixed angle fastener assembly that is able to securely connect the orthopedic device to bone tissue. Furthermore, in an exemplary embodiment, the present invention provides a fastener assembly having a locking mechanism that will quickly and easily lock the fastener assembly with respect to the orthopedic device.09-08-2011
20120310291Polyaxial bone screw with split retainer ring - A polyaxial bone screw includes a head member and a shank member. The shank has a capture end and an opposite threaded end for threaded insertion into a vertebra. The head has a U-shaped cradle for receiving a spinal fixation rod and a central bore for receiving the capture end of the shank. An expandible retainer ring with a radial split is snapped onto the capture end of the shank to retain it within the head. The retainer ring has a spherical outer surface which forms a ball joint with a spherical socket cavity within the head to enable the head to be angled relative to the shank. A threaded closure plug is tightened within the cradle to clamp the rod into engagement with a knurled dome on the capture end of the shank to secure the rod relative to the vertebra.12-06-2012
20120041495Bone Screw - A bone screw having a screw member possessing a threaded section and a head and a receiving part at the head end for receiving a rod to be connected to the bone screw is provided. The receiving part has on open first bore and a substantially U-shaped cross-section having two free legs provided with a thread. Furthermore, the receiving part has a second bore on the end opposite to the first bore whose diameter is greater than that of the threaded section and smaller than that of the head. On the bottom of the first bore a seat for the head is provided. In order that the screw member can be pivoted to at least one side by an enlarged angle, the edge bounding the free end of the second bore viewed relative to the axis of the first bore is of asymmetric construction.02-16-2012
20120046700Polyaxial bone anchor with pop-on shank and pivotable retainer - A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in a receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. The shank upper portion expands a retaining member in the receiver cavity to capture the shank upper portion in the receiver. The retaining member and attached shank are pivotable with respect to the receiver until locked in place with respect to the receiver. A pre-assembled receiver, retaining member and compression insert may be popped-on or snapped-on to the shank upper portion prior to or after implantation of the shank into a vertebra.02-23-2012
20120004690SCREW FIXATION SYSTEM - A screw fixation system serves to facilitate attachment of an orthopedic implant to a fractured bone to facilitate healing thereof. The screw fixation system includes the orthopedic implant, a bone screw, and a screw fixing element. The orthopedic implant includes an opening formed thereby. The screw fixing element has a body including an aperture extending between upper and lower surfaces thereof, and a channel adapted to receive a portion of the orthopedic implant adjacent the opening. When the portion of the orthopedic implant is received in the channel and the bone screw is inserted into the aperture, engagement of at least a portion of threads formed on a head of the bone screw and threads formed in the aperture expands the screw fixing element against the orthopedic implant to fix the bone screw and the orthopedic implant relative to one another.01-05-2012
20090125072Surgical bone screw construction - A surgical bone screw includes an elongate body having a proximal end, a distal end, a threaded portion on the circumference of the body, and a passage extending between the proximal and the distal ends of the body. An electrical conductor is disposed in the passage between the proximal and the distal ends of the screw body. The conductor has a first terminal at the proximal end and a second terminal at the distal end. The conductor and both of the terminals are electrically insulated from surrounding portions of the screw body. When the screw is driven into bone tissue and a stimulating current is applied to the first terminal, the current is directed substantially through the conductor to flow into tissue adjacent to the second terminal at the distal end, without shunting by other tissue that surrounds the screw body.05-14-2009
20120010669PEDICULAR FACET FUSION SCREW WITH PLATE - Spinal implants and methods for spinal stabilization and/or fusion are provided. Exemplary implants described herein can be configured for delivery to a facet joint to stabilize and/or fuse the facet joint, and can optionally be anchored within the pedicle for added fixation. The implant can optionally include a fusion-promoting bioactive material thereby providing a single device capable of spinal stabilization and/or fusion. Furthermore, a method of placing such an implant within a facet joint is provided.01-12-2012
20120010668EXPANDABLE SURGICAL IMPLANT - An implant includes an elongate body having at least two radially expandable portions in the vicinity of the distal end thereof. An expander is disposed at least partially within the axial bore of the body, the expander including a longitudinal shaft and a tip at the distal end of the shaft. The expander is longitudinally movable between a distal position wherein the tip is positioned distal to the distal end of the body and a proximal position wherein the expandable portions of the body are moved to a radially outward expanded configuration by a camming action of the tip.01-12-2012
20120016424EXTENSIONS FOR SPINAL ANCHORS - Systems and methods for positioning a connecting member adjacent the spinal column include at least one anchor assembly having an anchor engageable to bony structure and a receiver for receiving the connecting member. An extension member is engaged to the receiver and defines a pathway that extends proximally from the receiver. The connecting member is movable along the extension member to the receiver of the bone anchor. The extension member is removable from the receiver of the bone anchor after the connecting member is positioned in the receiver to provide a low profile anchor and connecting member assembly when finally implanted in the patient.01-19-2012
20120022603SPINAL FACET COMPRESSION SCREW WITH VARIABLE PITCH THREAD ZONES AND BUTTRESS HEAD - A surgical implant comprising a screw element having a screw head, a first thread having a first thread pitch, a second thread having a second thread pitch and an intermediate portion coupling the first and second thread pitches with the first and second thread pitches being different. The implant has a buttressing head associated with the first thread, and it is dimensioned to be larger than a diameter of the first threads to provide external buttressing as the first and second threads compress a first bone and a second bone together.01-26-2012
20120059427DEVICE FOR THE DYNAMIC FIXATION OF BONES - An intermediate element for a detachable, lockable, ball joint-like connection in a device for the dynamic fixation of bones has a longitudinal axis, an outer wall concentric with the longitudinal axis, and an inner wall forming a coaxial cavity. Either the outer wall or the inner wall comprises one of two contact zones that form the ball joint-like connection. The intermediate element is at least partly made of a super-elastic or visco-elastic material.03-08-2012
20120209336Polyaxial bone anchor with pop-on shank, friction fit retainer and winged insert - A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in an integral receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. A down-loadable compression insert with tool receiving arm extensions, a down-loadable friction fit split retaining ring and an up-loadable shank upper portion cooperate to provide for pop- or snap-on assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra. The shank and receiver once assembled cannot be disassembled.08-16-2012
20100168802Renew compression screw - An external fixator implant screw with an intercalated head, of which one embodiment for lag screw mode has a spherical head, and a partial thread. The spherical head in countersunk bone exerts concentric wide contact on insertion at various angles to surface. Optional canalization of central rod allows guide wire technique and optional mobility of head allows variable shaft length between head and thread. Another embodiment for use in basic implant mode, in a single bone fragment, at right angles to bone surface, has a conical head with limited basal contact on bone, the head being integrated to a solid rod and is fully threaded from head to leading tip. In both embodiments, the load transmission is renewable from outside in case of loosening, without reopening any wound. The implant is made of biocompatible material.07-01-2010
20120158069Spring Screw Apparatuses and Methods of Using Same - A locking spring screw, comprising: a cylindrical screw body; a flexible spring member; and, a screw head attached to the cylindrical screw body, wherein the screw head comprises a tool slot adapted for receipt of the spring member, at least one outlet adjacent to the tool slot adapted for passage therethrough of a tongue of the spring member, and, a ridge located opposite the at least one outlet from the cylindrical screw body and at least partially around the circumference of the screw head.06-21-2012
20120158070Orthopedic implant rod reductiion tool set and method - A tool set for implanting a rod in a human spine in conjunction with bone screws. The tool set includes a pair of end guide tools that receive opposite ends of the rod in channels and under manipulation by a surgeon facilitate transport of the rod toward the bone screws attached to the guide tools. Intermediate guide tools having guiding pass through slots are utilized to guide intermediate locations along the rod toward associated bone screws. An attachment structure operably connects the guide tools to the bone screws. The guide tools each include a lower guide and advancement structure to allow a closure top with mating structure to be rotated and driven downward against the rod and to cooperate with similar structure in the bone screw to seat and lock the rod therein.06-21-2012
20110106177ANCHOR FOR USE WITH ORTHOPEDIC SCREW - The invention provides devices and methods for stronger and more stable spinal and other orthopedic implant fixation through the use of an anchor for an orthopedic screw e.g, a pedicle screw. The anchor includes a relatively rigid proximal flange and a distal flexible portion that has an inner surface engageable by the screw shank as it is installed in a patient. For use, the distal portion of the anchor is located in a tract of the patient and the screw then installed through the anchor in the tract. During installation, outwardly-directed radial pressure of the screw shank upon inner surfaces of the flexible distal portion of the anchor can cause enhanced engagement of the bones or body structures by the anchor. The anchor flange can include teeth for engaging bones or other body structures, so as to provide improved support for the orthopedic installation.05-05-2011
20110106174Direct Control Spinal Implant - A bone anchor assembly is provided, which may be used in cervical, thoracic, lumbar or sacral areas of the spine or other orthopedic locations. The anchor assembly includes a bone anchor, a receiver mounted to the bone anchor, a saddle within the receiver, a spacer within the receiver, and an engaging member. The receiver extends along a central longitudinal axis proximally away from the bone anchor. A rod or other elongated connecting element is received in a passage of the receiver in contact with the saddle, and the engaging member engages the connecting element against the saddle, which engages the saddle against the spacer, which in turn engages the proximal head of the bone anchor in the receiver. The orientation of the saddle in the receiver is adjustable to correspond to the orientation of the connecting element relative to the central longitudinal axis of the receiver.05-05-2011
20110106176Polyaxial bone screw with multi-part shank retainer and pressure insert - A polyaxial bone screw assembly includes a threaded shank body having an upper portion, a receiver, a compression insert and an articulation structure made from at least two discrete pieces. The shank upper portion cooperates with the compression insert to place the retainer in frictional engagement with the receiver. The geometry of the retainer structure pieces corresponds and cooperates with the external geometry of the shank upper portion to frictionally envelope the retainer structure between the capture structure and an internal surface defining a cavity of the receiver.05-05-2011
20100249855Bone repair eyelet - A bone repair eyelet (09-30-2010
20120232598POLYAXIAL PEDICLE SCREW WITH INCREASED ANGULATION - A polyaxial bone anchor including a housing and a bone screw. A bottom surface of the housing includes an aperture that defines an angulation limit of the bone screw for each azimuthal angle around a longitudinal axis of the housing. The aperture is V-shaped, with the V-shape having converging side walls that define a low-angulation direction near their intersection and a high-angulation direction opposite the low-angulation direction. In some cases, the angulation limit of the bone screw is generally constant over a range of azimuthal angles centered around the high-angulation direction. The housing may be modular, including tabs on one component that are plastically deformed to engage a lip on another component. During assembly, a mandrel advances longitudinally along a bore in the housing, and forces the tabs radially outward toward the lip to a radially outward plastically deformed state.09-13-2012
20120130436HEAD TO HEAD CONNECTOR FOR BONE FIXATION ASSEMBLIES - An apparatus and method for reinforcing a bone fixation assembly includes a first connector element for coupling to a first bone screw assembly, a second connector element for coupling to a second bone screw assembly, and an elongated connecting element that interconnects the first connector element and second connector element. An end of the first connector element is adapted to engage an elongated fixation element in a first bone screw assembly, and an end of the second connector element is adapted to engage an elongated fixation element in a second bone screw assembly.05-24-2012
20120316606DEVICE FOR ENHANCED MECHANICAL STABILIZATION - The invention relates to a device that provides enhanced mechanical stabilization, as well as methods for its use. In various embodiments, the device is configured in a manner similar to a conventional screw, but with mechanical elements that afford greater fixation and stability and that lessen the likelihood that the device loosens after insertion into a substrate and/or falls out of the substrate entirely or releases its interaction with the substrate. Moreover, the device may have better pullout strength as compared with conventional screws and screw-type devices used in a range of applications.12-13-2012
20120316605Taper Lock For A Polyaxial Spinal Rod Screw Assembly - A collet for a spinal rod bone screw assembly is configured to provide an interference fit with the top or head of a polyaxial bone screw in order to aid in locking orientation of a polyaxial bone screw head relative to the polyaxial bone screw. An increase in spherical coverage created by the configuration of the collet increases the amount of surface contact with the polyaxial bone screw head. This allows for more controlled, uniform and secure orientation of the polyaxial head with respect to the bone screw during lock-up. A resilient, tapered base of the collet has a plurality of slots that allow the end of the collet to splay outwardly over and upon the head of the bone screw to create a snap or frictional interference fit between the collet and the polyaxial bone screw head when a spinal rod is fixed in the polyaxial bone screw head.12-13-2012
20120215264EXTENSIBLE PEDICLE SCREW COUPLING DEVICE - An extensible pedicle screw coupling device for holding a spinal rod in the head of a pedicle screw is disclosed. The device is extensible so as to fasten to the rod stably while maintaining fixing power if there is a gap between the vertebra and the rod. The device comprises pedicle screws that are inserted into the vertebrae, and a coupler in which the pedicle screw inserted into the vertebra and a head of the pedicle screw are connected, and the rod is housed therein, and fixes the rod by screw fastening the retainer to a thread formed on the top, and an extending means that can adjust the length so as to correspond to the distance between rod and vertebra is installed on the pedicle screw and the coupler.08-23-2012
20120083851METHOD FOR POLYAXIAL SCREW SYSTEM - A method for mounting a polyaxial screw into a bone includes rotating a drive cap so that a screw mounted to the drive cap is screwed into a bone, the drive cap having a socket in which a portion of the screw is pivotably disposed, at least a portion of a collet being disposed within the socket between the screw and the drive cap. A stabilizing structure and a fastener are positioned onto a shaft projecting from the drive cap. The fastener is advanced along the shaft so as to push a portion of a compression cap against the collet which in turn wedges the collet within the socket of the drive cap and causes the collet to bias against a portion of the screw, thereby locking the position of the screw, the collet, and the drive cap relative to each other.04-05-2012
20120083850Locking Pedicle Screw Devices, Methods, And Systems - An embodiment of the invention provides for a pedicle screw system including a bone anchor, linkage rod, tulip, set screw, and detent plate. When the set screw is fully tightened against the detent plate, pluralities of ridges on opposing faces of the detent plate and set screw cooperate by providing catches to prevent unwanted loosening of the set screw, which could lead to unwanted rod slippage and instability in the orthopedic fixation unit.04-05-2012
20120215265BONE SCREW FOR POSITIVE LOCKING BUT FLEXIBLE ENGAGEMENT TO A BONE - A fracture fixation device is described for fixing a bone having a near cortex and a far cortex, comprising a shaft portion configured to span a distance between the near cortex and the far cortex of the bone; a head portion adjoining the shaft portion and providing for engagement of the device with a bone plate, wherein the head portion is integral with the shaft portion; and a threaded front section for engagement of the device with the far cortex of the bone, wherein the device permits motion of the shaft portion relative to the near cortex.08-23-2012
20110184474POLYAXIAL SCREW ASSEMBLY - A polyaxial screw assembly includes an internal load dampening mechanism for sharing and dampening loads between at least one screw member and at least one rod member interconnected by the assembly. A method of interconnecting the orthopedic screw with the rod includes dampening with a body member interconnecting the screw to the rod.07-28-2011
20110184473Method and apparatus for spinal fixation using minimally invasive surgical techniques - An improved method and guide wire assembly used in a system, set of instrumentation and method comprising the combination and use of plural pedicle screws, a rod for connecting pedicle screws in a relatively rigid manner, and instrumentation to optimize insertion of the rod into the pedicle screws, the assembly having a guide wire and instrumentation to grasp a medial portion of the guide wire to pull the medial portion through all the pedicle screws and connecting the loop to the end of a fixation rod, whereby one end of the guide wire is mounted to a pedicle screw, all the screws are implanted into the vertebrae, and the rod subsequently guided into the pedicle screws by pulling the guide wire loop back through the pedicle screws, all using minimally invasive surgical incisions.07-28-2011
20100174324Implantable orthopaedic device composed of a support structure having at least one orifice associated with a nut, for the passage of a locking screw - This implantable orthopedic device comprises a support structure (07-08-2010
20100174325Poly-axial pedicle screw assembly - A clamping body for a pedicle screw assembly has an axial passage extending axially between first and second end portions thereof. The spine rod-receiving channel extends through the first end portion in a traverse direction with respect to the axial passage thereby forming upstanding leg portions of the clamping body and closed end portion of the spine rod-receiving channel. A material thickness reducing relief is provided in an outer surface of each one of the upstanding leg portions at a location between the closed end portion of the spine rod receiving channel and the first end portion of the clamping body whereby the a partial segment of the upstanding leg portions are frangibly detachable. A bridge member is frangibly connected between the upstanding leg portions at the first end portion of the clamping body. The bridge member spans across the spine rod-receiving channel.07-08-2010
20110190830BONE SCREW - A bone screw is provided including a tubular body and a head as separate parts. The tubular body has a first end, a second end, a tubular wall defining a cavity and a plurality of openings extending through the tubular wall into the cavity. The tubular body also includes a continuous exterior bone thread on an exterior tubular surface of the tubular wall. The continuous exterior bone thread extends for at least one full revolution about the tubular surface. The head defines an inner bore and includes an engagement structure to engage with a driver to advance the bone screw in the bone when a rotating force from the driver is applied to the engagement structure in a first direction, and a connection structure to connect to the tubular body at the first end. The head is connected to the tubular body by the connection structure in such a way that the head is locked against disconnection from the tubular body when a rotating force from a driver is applied to the engagement structure in a second direction opposite to the first direction.08-04-2011
20100298889BONE SCREW - A bone screw has a screw head and a threaded shank. An axial bore into which a plurality of radial bores set at a distance from each other open, extends through the threaded shaft. The axial bore is open at the screw head side end, and the radial bores are also open at the radially outer end. The axial bore is closed in an axial direction in the area of the end of the screw shank that lies opposite the screw head.11-25-2010
20100274296Multiplexed Screws - A bone fixation element comprises a shaft extending substantially along a longitudinal axis of the fixation element in combination with a head including a plurality of fixation element openings distributed about a perimeter thereof. Each of the fixation element openings extends through the head from a proximal surface thereof to a distal surface of the head. Each of the fixation element openings extends through the head along an opening axis.10-28-2010
20100274295MEDICAL IMPLANT CONFIGURED TO DELIVER A THERAPEUTIC SUBSTANCE - Embodiments of the invention comprise a medical implant that delivers a therapeutic substance. In some embodiments, a component that delivers a therapeutic substance is a cap secured to a portion of a fastener such as a surgical construct, surgical screw, pedicle screw, spinal rod cross-link, or other connection element or device.10-28-2010
20120179210PEDICLE SCREW ASSEMBLY WITH INCLINED SURFACE SEAT - A bone stabilizer assembly includes a fixation element, a coupling element, and a compression nut. The fixation element is adapted to engage a bone and having a head portion and shank portion. The coupling element has an internal bore sized to receive the shank portion of the fixation element and a pyramid-shaped seat for supporting the head portion of the fixation element. The coupling element is adapted to receive a stabilizer rod. The compression nut is engagable with the coupling element and is adapted to rotatingly move distally into the coupling element to translate a force to the head portion through the rod and the saddle such that the head portion is forced against the seat of the coupling element to prevent relative movement between the fixation element and the coupling element.07-12-2012
20120179209RECEIVING PART FOR RECEIVING A ROD FOR COUPLING THE ROD TO A BONE ANCHORING ELEMENT AND A BONE ANCHORING DEVICE - A receiving part for coupling a rod to a bone anchoring element includes: a receiving part body with a rod receiving portion and a head receiving portion having an open end for introducing a head of a bone anchoring element, and a locking ring, wherein the head receiving portion includes a plurality of flexible wall portions, the flexible wall portions and the locking ring being configured to engage each other at circumferentially distinct pressure areas having positions corresponding to circumferentially separated projections on at least one of the flexible wall portions or the locking ring, and wherein the locking ring exerts a first force on at least one of the flexible wall portions at a corresponding pressure area, and exerts a second force less than the first force on the at least one flexible wall portion in a region circumferentially adjacent to the corresponding pressure area.07-12-2012
20120253408SCREW ASSEMBLY WITH DEFORMABLE BUSHING - A bushing for a bone screw assembly includes a distal portion, a receiver portion, and a proximal portion. The distal portion includes a distal engagement surface that engages with a head of a bone screw. The receiver portion receives a fixation rod. The proximal portion includes a proximal engagement surface that engages with a locking member and a deformable portion that deforms from a first configuration to a second configuration based on a force applied by the locking member.10-04-2012
20120253409BONE ANCHOR WITH LOCKING CAP AND METHOD OF SPINAL FIXATION - A bone anchor (10-04-2012
20110125195Bone Screw - A bone screw having a screw member possessing a threaded section and a head and a receiving part at the head end for receiving a rod to be connected to the bone screw is provided. The receiving part has on open first bore and a substantially U-shaped cross-section having two free legs provided with a thread. Furthermore, the receiving part has a second bore on the end opposite to the first bore whose diameter is greater than that of the threaded section and smaller than that of the head. On the bottom of the first bore a seat for the head is provided. In order that the screw member can be pivoted to at least one side by an enlarged angle, the edge bounding the free end of the second bore viewed relative to the axis of the first bore is of asymmetric construction.05-26-2011
20120232597FLEXIBLE FIXATION DEVICE - Disclosed are several embodiments directed to a flexible fixation device and method to provide adequate purchase into bone at angles that are awkward for properly engaging inflexible and rigid screws. In one instance, the fixation device is comprised of a head to effect engagement of the device and to acts as an insertion-stop for the device, as well as a helical portion of a suitable cross-sectional geometry to allow for adequate purchase into bone. The helical portion provides fixation as the helical form engages the bone over a relatively large surface area relative to the size of the entry point. The helical portion may be variously configured to resemble, for example, a cork screw, a coiled spring, and so forth. Most variations offer both flexibility (to make angled insertion achievable) while still retaining enough helical-directional rigidity to achieve the desired implantation and fixation.09-13-2012
20110009909OSTEOSYNTHESIS DEVICE COMPRISING A SUPPORT WITH A TAPPED ORIFICE ASSOCIATED WITH A BEARING SURFACE FOR RECEIVING AN ANCHORING ROD - This osteosynthesis device is of the type comprising: a support provided with a through-orifice, at least one part of the height of which is threaded, and an anchoring rod having a threaded part forming a screw, the thread of said threaded part being complementary to that of said support orifice, in order to hold said rod on said support by screwing, said support and said rod furthermore including complementary bearing surfaces. The protruding ends of the screw threads and support threads are truncated in such a way that the difference between the outside screw diameter and the flank diameter is between 5 and 70% of the difference between the nominal diameter and the flank diameter, and the difference between the flank diameter Df and the core diameter is between 5 and 70% of the difference between the flank diameter and the root diameter.01-13-2011
20110040336Thread-thru polyaxial pedicle screw system - A thread-thru polyaxial pedicle screw fastening system. The fastening system consists of an anchoring bone screw having threads on one end for use in anchoring to the screw to the spine and a spherical connector on the other end operating as a pivot point about which a U-shaped connecting assembly moves in a polyaxial fashion. The U-shaped connecting assembly, for receipt of a spinal connecting rod, has a biased retainer ring for maintaining a positive tension between the connecting assembly and the anchored screw. The system allows for an improved manufacturing step wherein the threaded shank of a bone screws can be passed through a lower portion of the connecting assembly allowing a variety of bone screw sizes to be used with a common sized connector.02-17-2011
20110046684Screw Assembly and Method - A screw assembly and method includes a coupling member comprising a semi-bulbous end; a fixator component that receives the semi-bulbous end of the coupling member; a resisting member mounted in the coupling member and comprising a mating member; a connection pin comprising a resisting member socket operatively connected to the mating member of the resisting member; and a blocker that engages the coupling member.02-24-2011
20110046683BONE ANCHORING DEVICE, TOOL AND METHOD FOR ASSEMBLING THE SAME AND TOOL FOR USE WITH THE SAME - A bone anchoring device includes an anchoring element having a shaft for anchoring in the bone and a head, a receiving part formed in one piece, and a pressure element formed in one piece. The receiving part has a seat for receiving the head and an outer channel for receiving a rod to be connected to the anchoring element, which is pivotable with respect to the receiving part and can be fixed at an angle by exerting pressure via the pressure element onto the head. The pressure element is movable in the receiving part and includes an inner channel for receiving the rod and a spring element that engages a portion of the receiving part via a detent connection so that the pressure element can be held in a position that allows pivoting of the anchoring element. The spring element is formed by at least a first portion of one of two side walls forming the inner channel, the first portion being spaced apart from a second portion of the one side wall by a slot. At least a portion of the detent connection is located on the one side wall.02-24-2011
20110046682EXPANDABLE FIXATION ASSEMBLIES - Expandable fixation assemblies, expandable cranial fixation assemblies, and expandable intervertebral implant assemblies are provided for securing structures to bone and for securing bones and/or bone segments with respect to each other. An expansion member can be moved through at least a portion of an expandable fixation body, thereby causing expansion of the expandable fixation body, such that bone engagement features of the expandable fixation body engage surrounding structure, such as bone.02-24-2011
20120323285BONE SCREW - A bone screw including a main body portion having a proximal end and a distal end. An external threaded surface and an internal threaded surface are formed on the main body portion. The external threaded surface intersects the internal threaded surface proximate a lower surface of the external threaded surface and a lower surface of the internal threaded surface. A plurality of bone growth apertures is defined on the surface of the main body portion where the external threaded surface and the internal threaded surface are not located. The bone growth apertures comprise between about 10 percent and about 60 percent of the surface of the main body portion.12-20-2012
20110218578Polyaxial bone screw with cam connection and lock and release insert - A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in a receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. A retaining member for capturing the shank in the receiver includes a sloping surface for a frictional, press fit, cammed engagement with the shank. A compression insert having a resilient structure provides non-floppy positioning of the shank with respect to the receiver and also independent locking of the shank with respect to the receiver.09-08-2011
20100234902RECEIVING PART FOR RECEIVING A ROD FOR COUPLING THE ROD TO A BONE ANCHORING ELEMENT AND A BONE ANCHORING DEVICE WITH SUCH A RECEIVING PART - A receiving part for receiving a rod for coupling the rod to a bone anchoring element, the receiving part including: a receiving part body having a channel for receiving a rod and defining an accommodation space for accommodating a head of a bone anchoring element, the accommodation space having an opening for inserting the head; and a pressure element at least partially in the accommodation space, the pressure element including a first portion having a recess to receive the rod, and a second portion having a flexible portion to clamp the head, wherein the pressure element is moveable along a longitudinal axis of the receiving part body from an inserting position to insert the head, to a pre-locking position to clamp the head in the receiving part by a pre-stress exerted by the pressure element, to a locking position to lock the head in the receiving part.09-16-2010
20100234901POLYAXIAL FASTENER ASSEMBLY - A polyaxial fastener assembly including a mechanical fastener having a proximal end and a distal end, the proximal end including a contact stress element, an articulating element disposed on the mechanical fastener adjacent and distal to the contact stress element, the articulating element having a convex surface and the contact stress element having a convex surface, and a receiver member adapted to receive therein the mechanical fastener, the receiving member having a first aperture having a concave bearing surface that articulates with the convex surface of the articulating element, a second aperture adapted for receiving therein an auxiliary mechanical fastener, and a third aperture for receiving therein a connector element, the third aperture being arranged with respect to the first and second apertures such that a connector element disposed in the third aperture is disposed between the contact stress element and the auxiliary mechanical fastener.09-16-2010
20100234903BONE ANCHORING ELEMENT WITH THREAD THAT CAN BE UNSCREWED - A bone anchoring element (09-16-2010
20120277805Rotatable Base Multi-Axial Screw Assembly - A multi-axial screw assembly comprises a receiver member, a base member, a crown and a bone anchoring member. The receiver member has an aperture configured to receive the base member and an internal groove. The base has a deflectable ring configured to mate with the internal groove of the receiver member and a slot configured to allow the deflectable ring to compress to a diameter less than the diameter of the aperture such that the base member may be compressed and axially received within the receiver member. The base member is axially restrained within the base member relative to the receiver member while allowed to rotate relative to the receiver member. The crown is received within the receiver member along the central axis of the receiver member. The crown maintains the diameter of the deflectable ring greater than the diameter of the aperture.11-01-2012
20110257691LOCKING CANNULATED BONE SCREW SYSTEM - A cannulated bone screw having a cannula or lumen defined herein is disclosed. The screw may be fully or partially threaded and may have a cancellous thread form. Alternatively, the head of the screw may be generally flat on its undersurface. The screw head may further include an anti-backout feature to ensure good contact with the mating bone surface. The screw may further include an anti-rotation feature on the underside of the screw head. It is further disclosed that insertion and seating of the screw may be accomplished via locking engagement between jaws on the screw driver and a short raised feature on the head of the screw. The screws may be fully or partially threaded. A rescue screw is additionally disclosed.10-20-2011
20120089196Upload shank swivel head bone screw spinal implant - A polyaxial bone screw having a bone implantable shank, a head and a retaining ring. The retaining ring includes an outer partial hemispherical surface and an inner bore. The shank mates and polyaxially rotates with the retaining ring inside the head. The head includes an internal cavity having a spherical shaped surface that mates with the ring surface and has a lower restrictive neck that prevents passage of the ring once the ring is seated in the cavity.04-12-2012
20110276098RECEIVING PART FOR RECEIVING A ROD FOR COUPLING THE ROD TO A BONE ANCHORING ELEMENT, BONE ANCHORING DEVICE, METHOD AND TOOL FOR ASSEMBLING THE SAME - A receiving part for receiving a rod for coupling the rod to a bone anchoring element includes a receiving part body with a first end and a second end; a rod receiving portion with a channel for receiving a rod, and a head receiving portion for accommodating a head of a bone anchoring element, the head receiving portion having an open end at the second end of the receiving part body and being flexible so as to allow introduction and clamping of the head; and a locking ring configured to be positioned around the head receiving portion, wherein the locking ring can assume a first position with respect to the receiving part body in which the locking ring is latched to the receiving part body in a position where the head receiving portion is expandable to facilitate insertion of a head of a bone anchoring element, and wherein the locking ring can assume a second position with respect to the receiving part body in which the locking ring is latched to the receiving part body in a position where the locking ring compresses the head receiving portion, such that when a bone anchoring element has a head inserted in the head receiving portion, the bone anchoring element is held adjustably at a first angular position relative to the receiving part. A method for assembling a bone anchoring device includes inserting the head of the bone anchoring element into the receiving part body; and moving the locking ring and the receiving part body relative to each other until the locking ring assumes the second position with respect to the receiving part body.11-10-2011
20110319945LATERAL SUTURE SCREW - A bone screw for lateral suture stabilization includes a post around which the suture winds. An attachment hole is located in the head of the bone screw above the post for connecting an end of the suture. Various suture configurations can be used around multiple bone screws in the lateral suture stabilization process to control the flexion of the suture upon movement of the joint. The suture is formed from a plurality of high strength high modulus polymeric fibers. The fibers are independent and free from intrinsic inter-fiber shear coupling found in braided or bonded fibers.12-29-2011
20120101533POLYAXIAL BONE SCREW WITH LATERAL CONNECTOR - A polyaxial screw body includes a side wall defining a lumen having a first end and a second end. An opening disposed at the first end of the lumen, includes an interior surface disposed in the side wall thereabout. The interior surface is adapted to accommodate a head portion of a pedicle screw. A transverse channel extends from a first aperture through the side wall to a second aperture and is adapted to accommodate a portion of a fixation rod therebetween. A lateral connector extending integrally from the side wall.04-26-2012
20120101532BONE SCREW - A bone screw having a screw member possessing a threaded section and a head and a receiving part at the head end for receiving a rod to be connected to the bone screw is provided. The receiving part has on open first bore and a substantially U-shaped cross-section having two free legs provided with a thread. Furthermore, the receiving part has a second bore on the end opposite to the first bore whose diameter is greater than that of the threaded section and smaller than that of the head. On the bottom of the first bore a seat for the head is provided. In order that the screw member can be pivoted to at least one side by an enlarged angle, the edge bounding the free end of the second bore viewed relative to the axis of the first bore is of asymmetric construction.04-26-2012
20100185247POLYAXIAL SCREW ASSEMBLY - A polyaxial screw assembly includes an internal load dampening mechanism for sharing and dampening loads between at least one screw member and at least one rod member interconnected by the assembly. A method of interconnecting the orthopedic screw with the rod includes dampening with a body member interconnecting the screw to the rod.07-22-2010
20130013004POLYAXIAL PEDICLE SCREW WITH INCREASED ANGULATION - A polyaxial bone anchor including a housing and a bone screw. A bottom surface of the housing includes an aperture that defines an angulation limit of the bone screw for each azimuthal angle around a longitudinal axis of the housing. The aperture is V-shaped, with the V-shape having converging side walls that define a low-angulation direction near their intersection and a high-angulation direction opposite the low-angulation direction. In some cases, the angulation limit of the bone screw is generally constant over a range of azimuthal angles centered around the high-angulation direction. The housing may be modular, including tabs on one component that are plastically deformed to engage a lip on another component. During assembly, a mandrel advances longitudinally along a bore in the housing, and forces the tabs radially outward toward the lip to a radially outward plastically deformed state.01-10-2013
20130013003POLYAXIAL BONESCREW ASSEMBLY - A bone screw assembly includes a screw, an outer housing, and an inner housing. The screw includes a shank and a head. The outer housing has a proximal end, a distal end, and a passageway extending longitudinally therethrough. The outer housing defines a saddle at the proximal end thereof for receiving at least a portion of a rod therein. The inner housing is positionable within the passageway of the outer housing. The inner housing has a recessed distal portion for receiving the head of the screw therein. The inner housing also includes a proximal surface defining a substantially V-shaped configuration for receiving rods of different diameters therein.01-10-2013
20130018428Orthopedic Fixation Devices and Methods of Installation ThereofAANM Harper; MichaelAACI PottstownAAST PAAACO USAAGP Harper; Michael Pottstown PA USAANM George; MilanAACI King of PrussiaAAST PAAACO USAAGP George; Milan King of Prussia PA USAANM Manninen; KatherineAACI LimerickAAST PAAACO USAAGP Manninen; Katherine Limerick PA USAANM Perkins; JohnAACI PottstownAAST PAAACO USAAGP Perkins; John Pottstown PA US - The present invention is generally directed to orthopedic fixation devices that comprise a coupling element and a bone fastener, whereby the bone fastener can be loaded into the coupling element through the bottom of a bore in the coupling element.01-17-2013
20110160778Poly-Axial Implant Fixation System - A fixation system comprises a rod, a fastener including a head and an elongated shank, a yoke and an insert. The yoke includes opposite arms defining a slot to receive the rod, an opening to receive the shank, a surface for supporting the fastener head, and a cross bore through each of the arms. The insert has a base configured for slidable insertion between the yoke arms, and defining a rod supporting surface and an opening sized to receive the fastener shank. The insert further includes a pair of resiliently deflectable fingers extending from the base and including a tab projecting therefrom configured to be received within a cross bore. Each tab defines a beveled face configured to bear against the yoke as the insert is advanced into the yoke slot and to deflect the fingers inward until the tabs are aligned with the cross bores.06-30-2011
20130023941POLYAXIAL BONE ANCHOR WITH POP-ON SHANK AND WINGED INSERT WITH FRICTION FIT COMPRESSIVE COLLET - A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in an integral receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. A down-loadable compression insert has a lower friction fit collet and an outer receiver press fit surface. A down-loadable retaining ring has at least one inner edge and outer tiered surfaces. The ring cooperates with the shank to provide for pop- or snap-on assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra. The shank and receiver once assembled cannot be disassembled. A uni-planar assembly is included.01-24-2013
20080249576Pedicle Screw System Configured to Receive a Straight or Curved Rod - A fastener and a bone fixation assembly for the internal fixation of vertebral bodies such as a pedicle screw is provided which allows a detachable tulip to be provisionally locked to a pedicle screw in a first position, while securely locking the tulip assembly to the pedicle screw when in a second position. According to one exemplary embodiment, the tulip assembly includes a tulip body, a coupling saddle, and an expansion ring serving as a fastener. The fastener secures the tulip body to the pedicle screw, while the coupling saddle provides a means to provisionally lock the tulip body at an angle relative to the pedicle screw via an interference fit. Incline planes on the walls of the tulip body provide means to rotationally lock a rod within the tulip assembly, and fully lock the tulip assembly to at an angle relative to the pedicle screw.10-09-2008
20130138157Polyaxial bone anchor having an open retainer with conical, cylindrical or curvate capture - Polyaxial bone anchor assemblies include a shank having an upper portion and a retainer for holding the shank upper portion in a receiver. The shank upper portion retainer interface is one of conical, cylindrical or curvate and may further include a radial ridge or undercut. The assemblies may include compression inserts.05-30-2013
20130138159Polyaxial bone anchor having an open retainer with conical, cylindrical or curvate capture - Polyaxial bone anchor assemblies include a shank having an upper portion and a retainer for holding the shank upper portion in a receiver. The shank upper portion retainer interface is one of conical, cylindrical or curvate and may further include a radial ridge or undercut. The assemblies may include compression inserts.05-30-2013
20130138158Polyaxial bone anchor having an open retainer with conical, cylindrical or curvate capture - Polyaxial bone anchor assemblies include a shank having an upper portion and a retainer for holding the shank upper portion in a receiver. The shank upper portion retainer interface is one of conical, cylindrical or curvate and may further include a radial ridge or undercut. The assemblies may include compression inserts.05-30-2013
20130090697Rod-Reducing Apparatus and Associated Methods - Embodiments are generally directed to an apparatus for reducing a rod into an orthopedic fixation device. An embodiment provides a rod-reducing apparatus. The rod-reducing apparatus may comprise a housing comprising a threaded through bore. The rod-reducing apparatus further may comprise a reduction shaft comprising a shaft portion and a through bore in the shaft portion, wherein the shaft portion may be configured to be received within the threaded through bore of the housing. The locking cap driver may comprise a locking cap driver comprising a shaft portion that may be configured to be received within the through bore of the reduction shaft, wherein a distal end of the shaft portion may be configured for attachment to a locking cap assembly.04-11-2013
20130096635EXTENDER COLLAR SYSTEM - A collar for extenders and an extender assembly including a collar is disclosed. The collar is configured to receive extenders and maintain the extenders in a parallel orientation so as to prevent splaying and premature beak-off of the extenders from the spine. Methods of use are disclosed.04-18-2013
20130103097DYNAMIC MULTI-AXIAL FASTENER - A device for attaching an elongated member to a vertebral member and provide for dampened movement of the elongated member. The device may include a receiver that receives an elongated member. The receiver may be movably attached to an anchor that may be attached to a vertebral member. A dampener may be positioned within the receiver. Further, one or more slots may be positioned in the receiver. The dampener and/or slots dampen the translational movement of the receiver and attached elongated member relative to the anchor in first and second directions, and may also buffer forces applied into the spine.04-25-2013
20130103098Polyaxial bone anchor with pop-on shank, friction fit retainer and lateral alignment feature - A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in a one piece receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. A down-loadable compression insert and a friction fit split retainer are located in the receiver providing pop- or snap-on assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra. Laterally located, spaced crimping apertures in the receiver press receiver walls into engagement with the insert to prohibit rotation of the insert with respect to the receiver.04-25-2013
20130103096BONE FASTENER FOR A SPINAL SURGICAL SYSTEM - A bone fastener includes a receiver defining a longitudinal axis and extending between a proximal end and a distal end, the proximal end including a first wall and a second wall that define an implant cavity, each wall having a proximal face. At least one of the first wall and the second wall include an extension extending proximally from the proximal face along the longitudinal axis, the extension having a distal end integral with the proximal face and a proximal end including a first locking part configured for fixation with a second locking part of an instrument. A bone penetrating member has a proximal end and a distal end, the proximal end of the bone penetrating member being connected with the distal end of the receiver.04-25-2013
20130123861POLYAXIAL BONE ANCHORING DEVICE - A polyaxial bone anchoring device includes a bone anchoring element having a shank and a head, a head receiving part having a first end, an open second end, and a hollow interior portion for receiving the head therein, a locking ring configured to be mounted around the head receiving part and having a rod receiving portion, a cap configured to be connected to the head receiving part, the cap having a central axis and two opposite legs extending in a direction of the central axis, and a locking element configured to extend from the cap to lock relative positions of the bone anchoring element and an inserted rod relative to the head receiving part, wherein the cap is rotatable relative to the head receiving part between a first position in which the cap is movable and a second position in which the legs engage the head receiving part.05-16-2013
20130123860POLYAXIAL BONE ANCHORING DEVICE - A polyaxial bone anchoring device includes a bone anchoring element having a shank and a head, a head receiving part having a first end, an open second end, and a hollow interior portion in communication with the open second end for receiving the head therein, the head receiving part being flexible for clamping the head, a locking ring configured to be mounted around the head receiving part and having a rod receiving portion, a cap configured to be connected to the head receiving part, and a locking element configured to extend from the cap to engage an inserted rod, wherein the head is pivotable in and the cap and the locking ring are rotatable relative to the head receiving part, and wherein when the locking element is tightened, an inserted rod and an angular position of the bone anchoring element are locked relative to the head receiving part.05-16-2013
20130123859CERVICAL SPINAL SYSTEM - An orthopedic fixation system, including a tissue anchor including a first instrument engagement feature and a second instrument engagement feature; a first tool engageable with the first instrument engagement feature, and a second tool engageable with the second instrument engagement feature, where the first and second tools are engageable simultaneously with the tissue anchor.05-16-2013
20130131734PEDICLE SCREW ASSEMBLY - A pedicle screw assembly having an axial load element engaging the structure joining the screw and the rod retainer. The axial load element generally holds the rod retainer in place with respect to the screw, while allowing manual movement when desired. In one embodiment, the pedicle screw assembly includes a ball-and-socket joint joining the screw head to the rod retainer. The assembly may include a saddle configured to secure a ball at the head of the screw within a socket in the rod retainer. The saddle may provide resilient compression in the axial direction. For example, the saddle may include a pair of axially-offset slots that extend partially across the saddle from opposite sides to define a bridge section. The resiliency of the saddle may be controlled by varying the characteristics of the slots and consequently the bridge section.05-23-2013
20110313472POLYAXIAL FACET FIXATION SCREW SYSTEM WITH FIXATION AUGMENTATION - A screw system includes a screw and a washer assembly captive to the screw. The washer assembly is polyaxially pivotable relative to the screw. The screw may be freely rotated in one direction relative to the washer assembly, but frictionally binds with the washer assembly when rotated in a second direction. Various auxiliary fixation features are disclosed.12-22-2011
20110313471SCREW DRIVER FOR A MULTIAXIAL BONE SCREW - A screwdriver for driving a multi-axial bone screw into a vertebra of the spine in one configuration includes an elongate shaft defining a driving tip at its distal end for engaging the head of the bone screw for joint rotational movement. The screw driver also includes an outer sleeve within which the inner shaft rotates freely. The outer retention sleeve releasably attaches to the yoke of the bone screw. Rotation of the inner shaft enables rotation of the bone screw threaded shank while the outer sleeve and yoke remain fixed. In another configuration, instead of the outer retention sleeve the screwdriver comprises a screw engagement member affixed to the shaft for joint rotational movement therewith, the screw engagement member comprising a stop sized to seat within a slot of the bone screw yoke, the stop being configured to rotate the yoke upon rotation shaft. A releasable retention member is provided on the screw engagement member for releasably attaching the screwdriver to the bone screw. Rotation of the shaft with the affixed screw engagement member causes common rotation of the entire bone screw including the threaded shank and the yoke.12-22-2011
20110313470Pedicle Screw Extension for Use in Percutaneous Spinal Fixation - A bone screw extension assembly for use in placing a connecting rod percutaneously into tissue of a patient comprises a multi-axial bone screw and a screw extension releasably coupled to yoke of the bone screw. The screw extension includes coaxially disposed outer sleeve and inner sleeves that are rotatable relative to each other. A screw engaging member projects radially from the distal end the inner sleeve and is configured to engage an extension coupling surface on the outer sleeve upon relative. A securement member including cooperative surfaces is defined adjacent the distal end of the inner and outer sleeves that is operable upon relative radially secure the sleeves together to thereby maintain the engagement of the screw engaging member and the bone screw.12-22-2011
20130144346Modular polyaxial bone anchor with retainer having interconnected pieces - A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in a one-piece receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. A down-loadable, friction fit compression insert (some with lock and release feature), a down-loadable two-piece, interconnected retaining ring articulatable with respect to the receiver and an up-loadable shank upper portion cooperate to provide for assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra.06-06-2013
20130144347Closure for open headed implant - A closure for an open headed medical implant, such as a bone screw. The closure having a cylindrical body having an axis of rotation and also having a radially outer surface with a thread or other guide and advancement structure thereon. The body having a plurality of apertures that open onto a top surface of the body and that are parallel to but spaced from the axis of rotation. The closure also has a break-off head centrally attached by a neck to the top surface of the body.06-06-2013
20110218579Polyaxial bone anchor with helical capture connection, insert and dual locking assembly - A medical implant assembly includes a polyaxial bone anchor having a shank, a receiver, a lower compression insert with surfaces for closely receiving an elongate connecting member and a dual closure structure that may include a single flange or helical flange. The dual closure structure independently engages the connecting member and the lower compression insert. A threaded capture connection of the bone anchor includes a shank upper surface exclusively engaging the lower compression insert and a retainer threadably attached to the shank and spaced from the upper surface, the retainer configured for polyaxial motion with respect to the receiver prior to locking.09-08-2011
20110230920SPINAL FIXATION APPARATUS AND METHODS - A bone engaging assembly includes first second bone engaging members. The first bone engaging member defines a first axis and has a first head and a first shaft. The first head defines one or more apertures therethrough. In embodiments, the first head defines a driver interface. The driver interface is defined within the first head and is configured to engage a driving instrument. In one embodiment, the first head includes a post extending from the first head that is configured to engage a rod coupling member. The second bone engaging member defines a second axis. The second bone engaging member defines a second head and a second shaft. The first axis of the first bone engaging member and the second axis of the second bone engaging member define an angle therebetween when the second bone engaging member is positioned within the one or more apertures of the first head.09-22-2011
20100318136Polyaxial bone screw assembly - A polyaxial bone screw assembly includes a threaded shank body having an upper head portion with a mating segment and a first partial spherical surface, a retainer structure being mateable with the mating segment of the upper head portion, the retainer structure having a second partial spherical surface such that when mated, the first and second partial spherical surfaces form a spherical ball member, a receiver defining an open channel and having a base with a seating surface partially defining a cavity, the open channel communicating with the cavity, the cavity communicating with an exterior of the base through an opening sized and shaped to receive the shank upper head portion therethrough, and a bushing sized and shaped to fit within open channel and cavity, the bushing having a lower rounded surface engageable with a top surface of the spherical ball member formed by the shank and retainer structure.12-16-2010
20100318135BONE ANCHORING DEVICE - A bone anchoring device includes a receiving part for receiving a rod, the receiving part has a first bore coaxial with a longitudinal axis and a second bore, and an anchoring element having a first end for insertion into the bone and a second end positionable within a second bore, the anchoring element being movable relative to the receiving part in limited angular range about the longitudinal axis, the angles lying in a single plane. The bone anchoring device further includes a fixation element cooperating with the receiving part to lock the anchoring element relative to the receiving part. The anchoring element is pivotable relative to the receiving part around one rotational axis transverse to the longitudinal axis.12-16-2010
20120283788MEDICAL APPARATUS, AND SURGICAL METHOD - An apparatus for automated implantation of an implant or for an automated augmentation process of hard tissue and/or hard tissue replacement material using a sheath element is provided. The apparatus comprises a casing, a converter operable to generate mechanical vibrations the converter inside the casing and displaceable in a longitudinal direction relative to the casing, and a sonotrode coupled to an output location of the converter. A shaft portion with a retention structure is rotationally coupled to the casing and is equipped for cooperating with a rotationally asymmetric element of the sheath element to rotationally couple the casing to the sheath element. An axial coupling is equipped for locking the casing to the sheath element. The shaft portion, the axial coupling and the sonotrode are mutually arranged so that the a distal end of the sonotrode may be introduced into a longitudinal opening of the sheath element.11-08-2012
20120283787PEDICLE SCREWS AND METHODS OF USE - A pedicle screw configured to secure a rod is disclosed. In some embodiments, the pedicle screw is provided with a shaft, a yoke, a cap, a saddle and at least one separating device. The shaft has a forward end, a rear end and a longitudinal axis, the forward end being configured for insertion into a bone. The yoke is attached to the rear end of the shaft and has an interior wall nearest the shaft configured to bear against a rod inserted into the yoke. The cap is configured to engage an end of the yoke opposite the shaft. The saddle has a first side configured to mate with the cap within the yoke, and has an opposite second side configured to bear against the rod. The at least one separating device is coupled between the cap and the saddle, and is configured to urge the cap and the saddle apart from one another. With this arrangement, the yoke, the cap, the saddle and the at least one separating device cooperate to urge the rod against the interior wall of the yoke when the at least one separating device urges the cap and the saddle apart. Methods of securing a rod to a pedicle screw are also disclosed.11-08-2012
20120283786ANCHORS EXTENDER ASSEMBLIES AND METHODS FOR USING - One nonlimiting embodiment is directed to an anchor extender releasably engaged with an anchor configured for engagement with one or more bones or bony portions. The anchor extender generally includes a first member and a second member positioned about and movable relative to the first member. The anchor extender is positionable adjacent the anchor and movement of the second member relative to the first member toward the anchor as the anchor extender is engaged with the anchor results in lateral displacement of the anchor extender relative to the anchor while the first member engages with a first side of the anchor and the second member engages with an opposite second side of the anchor. However, in other embodiments, different forms and applications are envisioned.11-08-2012
20130184770LOW-PROFILE, UNIPLANAR BONE SCREW - A bone screw that is a low-profile, uniplanar bone screw is provided. The bone screw is for adjusting a position of a rod. The bone screw includes a main body, a rocker and a rod-securing element. The main body has a shaft with a threaded part. The rocker is coupled to and moveable relative to the main body. The rocker is configured to at least partially receive the rod. The rod-securing element is configured to secure the rod between the rocker and the rod-securing element and relative to the main body. The rod-securing element includes a fulcrum serving as an axis of rotation about which the rod rotates.07-18-2013
20120004689LOCKING ASSEMBLY FOR SECURING A ROD MEMBER IN A RECEIVER PART FOR USE IN SPINAL OR TRAUMA SURGERY, BONE ANCHORING DEVICE WITH SUCH A LOCKING ASSEMBLY AND TOOL THEREFOR - A locking assembly for securing a rod in a receiving part of a bone anchoring device includes a first locking element having a first end and a second end and a longitudinal axis of rotation and an outer surface provided with an external thread, a coaxial bore passing entirely through said first locking element and an internal thread provided at said bore, a second locking element having a longitudinal axis of rotation and an outer surface with an external thread cooperating with the internal thread of said first locking element. The first locking element has a recess between the first end and the second end, that defines a circumferentially closed wall portion. The interior of the wall portion has a longitudinally extending structure for engagement with a tool. Furthermore, a tool is provided which has sections which can be independently engaged with the first and second locking element, respectively.01-05-2012
20120016425MULTIPLANAR BONE ANCHOR SYSTEM - The present teachings provide one or more surgical implements for repairing damaged tissue, such as in the case of a spinal fixation procedure. A bone anchor is provided. The anchor can include a bone fastener. The bone fastener can include a head and a second end adapted to engage an anatomy. The bone fastener can extend along a longitudinal axis. The anchor can also include a coupling arrangement coupled to the head of the bone fastener so that the bone fastener is rotatable about the longitudinal axis to define a first plane of motion. The anchor can further include a saddle, which can be coupled to the coupling arrangement. The saddle can be movable relative to at least one of the bone fastener and the coupling arrangement to define a second plane of motion.01-19-2012
20120029577SYSTEM AND METHOD FOR BONE FIXATION USING BIODEGRADABLE SCREW HAVING RADIAL CUTOUTS - A system for bone fixation is provided including a biodegradable polymer screw and corresponding driver element. The screw is provided with a head having at least two regularly spaced notches. The driver element is provided with a distal end having at least two regularly spaced notches. The outer surface of the driver can correspond to the outer perimeter of the screw head and the notches and prongs are adapted to securably couple in a displacement fit to allow the drive to apply the screw into bone.02-02-2012
20120035670Polyaxial bone anchors with pop-on shank, fully constrained friction fit retainer and lock and release insert - A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in an integral receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. The receiver can have crimp tabs, but is devoid of spring tabs and collet-like flexible structures. A down-loadable compression insert (some with lock and release feature), a down-loadable friction fit split retaining ring having super structure for temporary friction fit with an up-loadable shank upper portion cooperate to provide for pop- or snap-on assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra. The shank and receiver once assembled cannot be disassembled.02-09-2012
20120046699SPINAL FIXATION SYSTEM - A polyaxial pedicle screw includes a housing, a bone screw member, and an anvil. The bone screw member includes a head and a threaded shaft extending from the head. The head is selectively securable within the housing. The anvil is positionable within the housing adjacent to the head of the bone screw member when the anvil and the head of the bone screw member are positioned within the housing. The anvil may define one or more grooves in an outer surface of the anvil. The groove defines a flap that is flexibly attached to the anvil to enable the anvil to flex an amount sufficient to maintain the head of the bone screw in constant contact with the anvil when the bone screw member is moved relative to the anvil.02-23-2012
20120095516DISTAL LOADING RECEIVER FOR A POLYAXIAL BONE SCREW AND METHOD FOR IMPLANTATION THEREOF - A distal loading receiver for a polyaxial bone screw includes a body member having a circumferential wall defining a bore disposed longitudinally through the body member. A skirt depends from a distal end of the body member. The skirt defines one or more distally opening slots and an abluminal surface of the skirt includes one or more transverse ribs proximate to a distal end of the skirt. A retaining ring includes a luminal surface having one or more transverse recesses proximate to a distal end of the luminal surface and one or more walls extending inwardly from the luminal surface. The slots accommodate the walls and the recesses accommodate the ribs to attach the body member to the retaining ring when the distal end of the skirt is inserted into a proximal end of the retaining ring.04-19-2012

Patent applications in class Head structure

Patent applications in all subclasses Head structure