Entries |
Document | Title | Date |
20080200956 | Low Profile Orthopedic Fastener Assembly Having Enhanced Flexibility - An orthopedic fastener assembly for stabilizing and fixing spinal column, bone sections and joints of the body. The orthopedic fastener assembly having a screw-pin anchor, a collet/inner coupling and head/outer coupling. Once assembled, the present invention has an even-lower profile, providing for multiple adjustments and enhanced flexibility, yet is easier to manufacture because of its greater tolerances than previously known assemblies. | 08-21-2008 |
20080228232 | PEDICLE SCREW FOR INTERVERTEBRAL SUPPORT ELEMENTS - The pedicle screw ( | 09-18-2008 |
20080234756 | Pedicle Screw - The invention relates to a pedicle screw for implants for the correction and stabilization of the spinal column, having a head part ( | 09-25-2008 |
20080234757 | Modular pedicle screw system - There is provided a modular pedicle screw assembly that includes various components which may be configured in various manners so as to provide different functionalities to the pedicle screw assembly. This advantageously decreases surgery time, reduces repetitive and tedious surgical steps, and allows for streamlining inventory of expensive medical equipment. In one embodiment, a pedicle screw assembly includes a pedicle screw, a rod holding element, an insert, a rod, and a set screw. The pedicle screw includes a threaded shaft and a cap. The rod holding element includes a screw hole, an insert bearing area, a chamber, chamber walls, a saddle area, and a threading area. The insert is disposed within the chamber, and the insert defines a bearing surface, an upper surface, side walls and a receiving area. The insert is positioned within the chamber such that the insert bearing surface contacts the rod holding element insert bearing area; additionally the side walls of the insert can bear against the chamber walls. The pedicle screw is positioned so that the screw shaft passes through the screw hold of the rod holding element and the screw cap rests within the receiving area of the insert. The rod is disposed so as to rest on the upper surface of the insert; and the set screw, joined to the threading area of the rod holding element, secures the rod to the upper surface of the insert. The insert may have a uniplanar configuration which allows movement of the insert, prior to final attachment, in a plane of motion. The insert may optionally have a monoaxial configuration which prevents movement of the insert. | 09-25-2008 |
20080249577 | DOME SHAPED IMPLANT AND INSERTER - An implant for resurfacing a joint and a driver for the implant. The inserter attaches to the head of the implant. The inserter is designed to facilitate the handling and insertion of an implant at a surgical site. The inserter is provided with a plurality of arms that securely engage a plurality of indents on the edge or periphery of the implant. | 10-09-2008 |
20080262556 | Modular polyaxial pedicle screw system - There is provided a modular polyaxial pedicle screw assembly that includes various components which may be configured in various manners so as to provide different functionalities to the pedicle screw assembly. This advantageously decreases surgery time, reduces repetitive and tedious surgical steps, and allows for streamlining inventory of expensive medical equipment. In one embodiment, a pedicle screw assembly includes a pedicle screw, a rod holding element, a polyaxial insert, a rod, and a set screw. The pedicle screw includes a threaded shaft and a cap. The rod holding element includes a screw hole, an insert bearing area, a chamber, chamber walls, a saddle area, and a threading area. The insert is disposed within the chamber, and the insert defines a bearing surface, an upper surface, side walls and a receiving area. The insert is positioned within the chamber such that the insert bearing surface contacts the rod holding element insert bearing area; additionally the side walls of the insert can bear against the chamber walls. The pedicle screw is positioned so that the screw shaft passes through the screw hole of the rod holding element and the screw cap rests within the receiving area of the insert. The rod is disposed so as to rest on the upper surface of the insert; and the set screw, joined to the threading area of the rod holding element, secures the rod to the upper surface of the insert. | 10-23-2008 |
20080288002 | Spinal Stabilization Systems and Methods - One embodiment provides a bone fastener including a collar, a fastener member, and a pin. The collar can have an upper portion with slot to receive an elongated member and a lower portion with a socket and an opening. The fastener member can have head and shank portions. The socket can receive the head portion and prevent movement of the head portion through the opening when the head portion is out of registration with the opening. The head portion and the socket can be configured to allow angulation of the fastener member within a defined range of motion within a selected plane. The head portion and the socket can define apertures which can be aligned with each other when the head portion is in the socket and which can receive the pin. One embodiment provides a generally spherical head portion with a flat. | 11-20-2008 |
20080294203 | PEDICLE SCREW FIXATION SYSTEM - A locking mechanism for locking a rod in a screw and rod fixation assembly includes a cap having a sidewall and a locking element extending from at least a portion of the sidewall. Locking mechanism cooperates with a receiver component for a spinal fixation rod to lock the rod in the receiver without requiring application of torque. A method of locking a spinal fixation member in a receiver of a screw fixation assembly includes the steps of placing the spinal fixation member into a channel of a receiver, axially advancing a locking cap into the receiver toward the spinal fixation member without application of any torque, and securing the locking cap in a locked position above the spinal fixation member without application of any torque. | 11-27-2008 |
20080306556 | BONE ANCHOR WITH A CURVED MOUNTING ELEMENT FOR A DYNAMIC STABILIZATION AND MOTION PRESERVATION SPINAL IMPLANTATION SYSTEM AND METHOD - A dynamic stabilization, motion preservation spinal implant system includes an anchor system, a horizontal rod system and a vertical rod system. The systems are modular so that various constructs and configurations can be created and customized to a patient. | 12-11-2008 |
20080319490 | Polyaxial bone anchor assembly with one-piece closure, pressure insert and plastic elongate member - A medical implant assembly includes a polyaxial bone anchor having a shank, a receiver, a lower compression insert with planar surfaces for closely receiving an elongate connecting member with planar surfaces and a one-piece closure structure. The connecting member is made from a polymer. The closure structure engages both the connecting member and the insert with the engagement between the closure structure and the insert securely locking the polyaxial mechanism even if the connecting member exhibits creep. | 12-25-2008 |
20090062867 | Surgical retaining system - In order to simplify the producibility of a surgical retaining system comprising a head part and a threaded shaft which is mounted thereon so as to be pivotable, passes through an opening in the underside of the head part and has on its upper side a spherical thickened area which engages in an interior space of the head part, which is open upwards, and can be moved in the direction towards the underside of the interior space by a clamping device arranged on the head part and thereby fixed in position relative to the head part, it is suggested that the opening in the underside of the head part be of a cylindrical design and have an inner diameter which is slightly smaller than the outer diameter of the spherical thickened area so that the spherical thickened area, during insertion into the opening, is pressed into the cylindrical opening with the aid of the clamping device and is secured in the opening against any pivoting movement. | 03-05-2009 |
20090082819 | Spinal stabilization device - A bone attachment device comprises an attachment collar having a hinged lid is disclosed. The bone attachment device may also comprise a bone fastener (such as a bone screw). A bone attachment device including an attachment collar and a spinal rod locking device is disclosed. A bone attachment device as described herein may be used together with a spinal stabilization rod and one or more additional bone attachment devices. Such devices are adapted to clamp and hold a spinal stabilization rod. Methods for implanting a spinal stabilizer having a bone attachment device including a hinged lid are disclosed. | 03-26-2009 |
20090105769 | UNI-PLANAR, TAPER LOCK BONE SCREW - Provided is a novel uni-planar taper lock screw for connecting a connecting rod to bone. The screw is capable of being secured to the underlying bone while the screw head adapted to securely hold a connecting rod is articulated in a unidirectional manner to facilitate a stable connection to the connecting rod. After the screw had been articulated and properly positioned, it can be partially locked such that the connecting rod will remain in relative position to the bone while permitting flexibility of the screw head relative to the bone along a single plane. The screw head can then be fully locked securing the connecting rod into a selected position. The screw is configured for easy insertion and connection as well as easy removal and disconnection from the connecting rod. Also provided is a system for fixing two or more bones or bone fragments and a kit for fixing bones or bone fragments. A method of fixing bones or bone fragments is also provided. | 04-23-2009 |
20090105770 | Rod Coupling Assembly and Methods for Bone Fixation - 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. Structures are provided to prevent disassembly of the anchor and coupling device prior to locking of the elongate member. | 04-23-2009 |
20090118773 | MINIMAL THICKNESS BONE PLATE LOCKING MECHANISM - A locking fastener for use with a bone plate. The fastener has threads on its shank to engage bone and threads on its head to engage the internal threads of the bone plate. The threads in the head may have a constant major diameter and a tapered minor diameter that creates a radial interference fit. The threads in the head may also have a variable pitch that creates an axial interference fit. The head may have a low profile to reduce soft tissue irritation. | 05-07-2009 |
20090143827 | DOUBLE COLLET CONNECTOR ASSEMBLY FOR BONE ANCHORING ELEMENT - A connector assembly including a bone anchoring element including a spherical head, a double collet that includes an inner clamping portion formed by inner surfaces of a plurality of resilient fingers, the resilient fingers defining a first wedge surface and a second wedge surface, an outer closure element that includes an inner clamping portion that corresponds in shape to an outer contour of the double collet, the outer closure element including a pair of arms that define a channel shaped for receiving therein a connector element, and an interface ring that includes a base formed with an inner wedge surface and a pair of wing extensions that extend from the base. | 06-04-2009 |
20090240290 | Buffer type vertebral pedicle screw - A vertebral pedicle screw includes a screw body driven into a vertebral pedicle, a housing assembled to an upperend of the screw body and having grooves for seating a rod and a threaded portion for locking a fastening bolt, the fastening bolt pressing the rod positioned thereunder as it is threaded downward, and a fastening ring inserted into the housing. The vertebral pedicle screw further includes an insert placed on an outer surface of a screw head of the screw body in the housing, installed to be partially come into contact with the fastening ring on an upper portion thereof, and accommodating the screw head ofthe screw body on a curved inner surface thereof such that the insert and the screw head are brought into sliding contact with each other, whereby an entire rod-side assembly can be slidingly moved in all directions with respect to the screw body. | 09-24-2009 |
20090312804 | ADJUSTABLE IMPLANT ASSEMBLY - An implant assembly includes a screw body, including anchor portion and proximal head portion, and a cradle movably mounted in the screw body to allow for controlled angulation between a spinal connection element disposed in the cradle and the screw body. The cradle is pivotable in one or more selected directions about one or more axes relative to the screw body. The cradle may be generally, substantially spherical in shape and allow for unrestricted movement in one or more directions around one or more axis. | 12-17-2009 |
20100004693 | CAM LOCKING SPINE STABILIZATION SYSTEM AND METHOD - A spine stabilization may include a rod and bone fastener assemblies. Each bone fastener assembly may include a bone fastener and a collar. Each bone fastener may have a threaded shank and a head. Each collar may have a first end with a cavity for accommodating the bone fastener and a second end having a channel for accommodating the rod. The channel may have a first portion for positioning the rod. The channel may have a second portion for advancing the rod, wherein rotating the collar advances the rod in the channel. | 01-07-2010 |
20100004694 | Screw assembly - Apparatus and method of using a screw assembly. The screw assembly includes a pedicle screw having a head portion and a shaft portion adapted to be secured to a vertebrae, and a body having pivotally coupled side portions configured to pivot from a first configuration for receiving the head portion of the screw into the body to a second configuration for engaging the head portion of the screw in a locking arrangement with the body. | 01-07-2010 |
20100010547 | Implant for Osseous Anchoring with Polyaxial Head - An osseous anchorage implant comprising an attachment structure adapted to receive and be attached to at least one bar, that is suitably an element of an osteosynthesis. The implant is made up of an osseous anchor and an attachment head bearing the attachment means. The attachment head is suitably traversed by a channel that is adapted to receive the bar. The attachment head comprises a clamp that is adapted to clamp the bar against an inside support wall of the channel. The implant is further characterized by the attachment means and the support wall enabling the rotation of the bar about a first axis that is not parallel to the longitudinal axis of the bar. The clamp comprises a moving clamping face, that is adapted to contact the bar, and that is borne by a support head that is articulatable at the end of the clamp via a ball and socket connection. The channel is suitably an open channel having an aperture opening onto one of the lateral faces of the attachment head, wherein the aperture bears the clamp. The bar is enabled to be introduced into the channel from a side of the channel. | 01-14-2010 |
20100023063 | SET SCREW WITH DEFORMABLE MEMBER - The present application is directed to set screws used with fasteners to capture and engage an elongated member. The set screws include a body sized to attach to a receiver of the fastener. A deformable member may be attached to an end of the set screw and provides for the set screw to more fully engage the elongated member to prevent potential damage to the elongated member and prevent the set screw from backing out of the fastener. In one embodiment, just the deformable member contacts the elongated member. In another embodiment, the deformable member and the body contact the elongated member. In yet another embodiment, a contact member is attached to the deformable member to contact against the elongated member. | 01-28-2010 |
20100023064 | CORTICAL TENTING SCREW - An implantable screw system for maintaining horizontal and/or vertical space during bone grafting procedures is provided, the screw comprising: a contoured head having a region adapted to support soft tissue and permit bone growth; a threaded shaft and a tip adapted to penetrate bone tissue; and where one screw contains a threaded chamber for engaging a second screw for additional space maintenance; wherein the screw(s) comprises cortical bone material. Methods of implanting one or more screws during bone grating procedures are disclosed. | 01-28-2010 |
20100030281 | Bone fixation apparatus - A bone fixation device configured for use within a uniformly, conically tapered, elongate cavity prepared in a bone. The device includes (a) an elongate body having a uniformly, conically tapered, elongate stretch which converges toward one end of the body, with the stretch taper substantially matching that of the prepared bone cavity, (b) exposed bone anchor structure formed on, and along at least a portion of, the tapered stretch, (c) a bone-ingrowth-promoting zone also formed on, and along at least a portion of, the stretch, disposed in operative association with the anchor structure, and (d) an external-device attaching feature formed as an enlargement included in the body, and joined to the stretch adjacent the body end which is remote from the body's mentioned one end. | 02-04-2010 |
20100030282 | Adjustable Tool For Cannulated Fasteners - A tool is disclosed for use in forming holes in bone and for driving a cannulated fastener into the formed hole. The tool may having a cutting tip for drilling a hole into bone, and may have a shaft and sleeve for accepting the cannulated fastener and for driving it into the drilled hole. The tool may be adjustable to allow fasteners of different lengths to be accepted, while ensuring that a portion of the cutting tip protrudes beyond the end of the fastener. A multiple-screw tool is also disclosed that allows more than one cannulated fastener at a time to be stacked on the tool, thus speeding the installation process. | 02-04-2010 |
20100036439 | Small joint fusion implant - A two-component system for joining two bones or bone fragments, in which a first component is threaded, self-tapping and bears an annular mating end to engage two mating pins on the end of a second component which is also threaded and self-tapping. The two components have opposite handed threads thereon, so that upon final installation into adjacent bone the final rotation brings the abutted bone surfaces into a compressive engagement as each components burrows deeper into its respective bone surface. | 02-11-2010 |
20100057138 | Locking screw with synchronized thread - A bone fixation system includes a bone plate and a bone screw having a threaded head. The inner surface of the bone plate is adapted for facing a bone surface on which the plate is mounted. The outer surface of the bone plate faces away from the bone surface. A through opening extends from the inner surface to the outer surface of the plate wherein the through opening comprises a guiding portion and a blocking portion. The guiding portion of the opening is provided with a guiding thread for guiding a thread of a shaft of the bone screw. The blocking portion is provided with a blocking thread for blocking a thread of the head of the bone screw. The blocking thread has a larger diameter than the guiding thread and the guiding portion is located closer to the inner bone plate surface than the blocking portion. | 03-04-2010 |
20100057139 | BONE ANCHOR FOR RECEIVING A ROD FOR STABILIZATION AND MOTION PRESERVATION SPINAL IMPLANTATION SYSTEM AND METHOD - A dynamic stabilization, motion preservation spinal implant system includes an anchor system, a horizontal rod system and a vertical rod system. The systems are modular so that various constructs and configurations can be created and customized to a patient. | 03-04-2010 |
20100057140 | BONE ANCHOR FOR RECEIVING A ROD FOR STABILIZATION AND MOTION PRESERVATION SPINAL IMPLANTATION SYSTEM AND METHOD - A dynamic stabilization, motion preservation spinal implant system includes an anchor system, a horizontal rod system and a vertical rod system. The systems are modular so that various constructs and configurations can be created and customized to a patient. | 03-04-2010 |
20100063553 | BONE FIXATION METHOD - A tulip assembly configured to be coupled to a head of a bone fixation device includes at least one inner member configured to fix the tulip assembly to the head of a bone fixation device, and an outer member including at least one engagement surface configured to selectively fix a rod in the tulip assembly via rotation of the outer member. | 03-11-2010 |
20100087874 | PEDICLE SCREW - Disclosed is a pedicle screw. By changing the structure of a threaded portion of a locking bolt engaged with a head of the pedicle screw and forming a groove on the locking bolt, the threaded portion is pressed in a fastening direction of the locking bolt, so that when a head of the pedicle screw is fastened to the locking bolt, a fixation cap is not released by the force applied from the head expanding towards an outside, and thus the locking bolt is easily fastened to the head of a screw body, thereby improving an inefficiency factor such as delay of surgical operation time due to release or interference of the fixation cap. | 04-08-2010 |
20100100137 | Dynamic Anchor Assembly for Connecting Elements in Spinal Surgical Procedures - Devices and methods include a multi-axial anchor assembly engageable to a vertebra and a connecting element positionable through a receiver of the anchor assembly. The anchor assembly includes a flexible member between the receiver and an anchor member of the anchor assembly, thereby providing a flexible joint in the anchor assembly for allowing limited movement after primary multi-axial capability between the receiver and the anchor member has been arrested. | 04-22-2010 |
20100106200 | BONE SCREWS AND PARTICULAR APPLICATIONS TO SACROILIAC JOINT FUSION - Procedures for the fusion of the sacroiliac joint advantageously make use of an implant selected to distract the joint upon insertion and to maintain or increase tension upon insertion. The implant can have a varying structure along its length. In some method described herein for fusing the sacroiliac joint using an implant, an implant is screwed into the sacroiliac joint between the sacrum bone and the iliac bone. The implant comprises a shaft, a tool engagement flange at top end of the shaft, a pointed tip comprising no more than about 20 percent of the length of the screw, and threads spiraling around the shaft. For screws of particular interest, the volume displacement perpendicular to the shaft increases at least about 5 percent from a point adjacent the tip to a point near the top of the shaft. Some of the desirable screw designs can be used in other orthopedic application, especially situations involving varying bone hardness. Useful filler material can be formed from a blend of bone powder and bioactive agents. | 04-29-2010 |
20100114179 | System And Method For Micro-Invasive Transfacet Lumbar Interbody Fusion - Spinal surgery systems are provided. In one embodiment, a system includes threaded caps and screw assemblies. Each assembly includes a cannulated and threaded screw having upper and lower ends, a polyaxial head permanently fixed to the screw upper end in a ball-and-socket engagement, and an extension portion fixed to the head wherein extension portion movement causes the head to move in concert. Each head has a receiving area for engaging a rod and a threaded area for receiving one of the caps after the rod is engaged in the receiving area. Each extension portion has: (a) two arms spaced apart such that the arms are on opposite sides of the polyaxial head receiving area; and (b) at least one point of weakness such that forcing the arms away from one another causes the extension portion to divide at the point of weakness and separate the extension portion from the head. | 05-06-2010 |
20100114180 | MULTI-PLANAR, TAPER LOCK SCREW WITH ADDITIONAL LOCK - A pedicle screw construct includes a pedicle screw, a coupling, a collet, and a set screw. The pedicle screw includes a shank having a helical thread formed thereon and a head at one end. The collet is positioned atop the head of the pedicle screw. The collet and pedicle screw are inserted into the coupling. The set screw is positioned in the collet such that the set screw contacts a portion of the rod and is releasably secured to the pedicle screw via a gripping tool. The pedicle screw is rotatable and pivotable relative to the collet and coupling assembly. | 05-06-2010 |
20100125302 | Locking Polyaxial Ball And Socket Fastener - A polyaxial ball and socket joint that can be locked into a fixed position. The fastening system consists of the polyaxial ball and socket joint used in conjunction with a bone screw having threads on one end for use in anchoring to the spine and a spherical connector on the other end operating as a pivot point about which a connecting assembly moves in a polyaxial fashion. A substantially U-shaped connecting assembly has a lower receptacle that operates as a socket for housing an upper retainer ring and a lower split retaining ring. The socket is receptive to the spherical connector which is inserted through the lower split retainer ring causing a momentary displacement thereof which allows for the positioning of the spherical connector between the upper and lower retainer rings. | 05-20-2010 |
20100131017 | Multi-Axial Bone Anchor Assembly - In one aspect, a bone anchor assembly is provided. The bone anchor assembly includes a bone anchor, a crown member, a saddle, and a sleeve. The bone anchor assembly is configured such that the bone anchor is moveable with respect to the saddle when the sleeve is positioned around the saddle and the bone anchor is locked relative to the saddle by compression of the head portion of the bone anchor between the crown member and a seat of the saddle. In another aspect, a system for orthopedic implantation is provided. The system includes an elongated member, a compression member, and a bone anchor assembly. In another aspect, a method of assembling a bone anchor assembly is provided. | 05-27-2010 |
20100131018 | POLYAXIAL BONE SCREW - The present invention generally provides a polyaxial fixation device having a shank with a spherical head formed on a proximal end thereof, and a receiver member having an axial passage formed therein that is adapted to polyaxially seat the spherical head of the shank. The polyaxial bone screw further includes an engagement member that is adapted to provide sufficient friction between the spherical head and the receiver member to enable the shank to be maintained in a desired angular orientation before locking the spherical head within the receiver member. | 05-27-2010 |
20100137919 | BONE SCREW - The invention relates to a bone screw with a shaft that defines a longitudinal axis and with a head that is configured as a thickened portion, said shaft and head being threaded. The thread of the shaft (bone thread) merges in an uninterrupted manner into the thread on the flared area of the head adjoining the shaft. As a result, part of the threaded head lies in the osseous tissue, giving a larger contact surface between bone screw and bone and improving the distribution and transmission of the loads and forces. | 06-03-2010 |
20100137920 | Pedicle screw implant system - A pedicle screw fastening that can be made polyaxial, monoaxial, fixed, or provide a predefined monoaxial placement. 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 or side loading connecting assembly is used to secure to a connecting rod for use in stabilization of a spine. The connecting assembly, for receipt of a spinal connecting rod, includes 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. | 06-03-2010 |
20100152787 | SPINAL FIXATION ASSEMBLY - A locking mechanism ( | 06-17-2010 |
20100152788 | PEDICLE SCREW SYSTEM WITH PROVISIONAL LOCKING ASPECTS - A tulip assembly configured to be coupled to a head of a bone fixation device includes at least one inner member configured to fix the tulip assembly to the head of a bone fixation device, and an outer member including at least one engagement surface configured to selectively fix a rod in the tulip assembly via rotation of the outer member, wherein the fixation of the tulip assembly to the head of the bone fixation device is independent of the fixation of a rod in the tulip assembly. | 06-17-2010 |
20100160980 | SPINAL FIXATION ASSEMBLY - A locking mechanism ( | 06-24-2010 |
20100160981 | Posterior Cervical Cross Connector Assemblies - A spinal cross connector head assembly and a cross connector assembly utilizing the spinal cross connector head assembly are configured for fixation to an existing spinal rod bone screw head. The spinal cross connector head assembly has one or more components which incorporate one or more breakaway portions that aid in the installation of the cross connector head assembly onto a polyaxial spinal rod bone screw assembly. The spinal cross connector assembly includes first and second spinal cross connector head assemblies each of which is configured for fixation to existing, adjacent spinal rod screw heads and connection with a cross connector rod. Each spinal cross connector rod head assembly has a dual breakaway system including a cross connector head component having a breakaway collar that, once detached, provides a polyaxial cross connector head, and a set screw component having a breakaway set screw that, once detached, provides fixation of the orientation of the polyaxial cross connector head relative to the polyaxial spinal rod bone screw head. | 06-24-2010 |
20100160982 | Instruments for Minimally Invasive Stabilization of Bony Structures - Systems for positioning a connecting element adjacent the spinal column in minimally invasive procedures include installation instruments that guide the connecting element from a location remote from one or more anchors to a location proximate to the one or more anchors. The installation instruments include extensions mountable to anchors engageable to the spinal column or other bony structure, and inserters mountable to the anchor extensions for positioning the connecting element adjacent the anchors. | 06-24-2010 |
20100179602 | Receiver body for spinal fixation system - A receiver body for an elongated spinal fixation element includes a housing portion with one or more flanges extending outwardly. In one embodiment, the receiver body includes first and second flanges extending outwardly from the housing portion. The housing portion includes first and second slots that form a passage through the housing portion. Each flange has a circular perimeter edge and a chamfered section, the chamfered section having a notched undercut for engagement with an instrument. In another embodiment, the receiver body includes a housing portion having a circular flange with a first chamfered section and a second chamfered section diametrically opposite the first chamfered section. The first chamfered section has a first aperture that opens out beneath the flange, and the second chamfered section has a second aperture that opens out beneath the flange. The first and second apertures form diametrically opposed pivot-attachment points for an instrument. | 07-15-2010 |
20100179603 | PEDICLE SCREW SYSTEMS AND METHODS OF ASSEMBLING/INSTALLING THE SAME - The pedicle screw system may be used for fixation of spinal segments and may be advantageous when minimally invasive surgery (MIS) techniques are employed. The pedicle screw system includes a tulip assembly comprising of a tulip body, an inner member, and an expansion member. Installation of the pedicle screw system into pedicles of the spine, for example, includes inserting the pedicle screw into a portion of the spine and then coupling the tulip assembly to the pedicle screw. The tulip assembly may be locked onto the pedicle screw before a distraction rod is placed in the tulip assembly. After the rod is placed in the tulip assembly, the tulip body and the inner member can be rotated relative to one another to lock the rod into the tulip assembly. In addition, the relative rotation may also provide additional locking of the tulip assembly to the pedicle screw. | 07-15-2010 |
20100198273 | ADJUSTABLE 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. | 08-05-2010 |
20100262196 | POSTERIOR PEDICLE SCREW HAVING A TAPER LOCK - A pedicle screw construct includes a pedicle screw, a coupling, and a collet. The pedicle screw includes a shank having a helical thread formed thereon and a head at one end. The collet is positioned atop the head of the pedicle screw. The collet and pedicle screw are inserted into the coupling. The pedicle screw is rotatable and pivotable relative to the collet and coupling assembly. The collet and the coupling each have a saddle that is adapted and configured for receiving a rod member. | 10-14-2010 |
20100268284 | MINIMALLY INVASIVE FIXATION SYSTEM - A minimally invasive fixation system and method for providing access to a surgical site. The fixation system may include a holding assembly, the holding assembling preferably including a lateral implant holder which may be attached to a pedicle screw and a sleeve positioned in connection with the lateral implant holder to prevent the lateral implant holder from separating from the pedicle screw. The sleeve may further include a tissue protection portion to keep the tissue out of the surgical site. A holding sleeve may be operably connected to the holding assembly and pedicle screw and may be used to insert the pedicle screw into the body. Multiple constructs may be inserted into the body so that a portion of the holding assembly extends from the body and provides access to and visualization of the surgical site. A rod holder may also be used to insert a rod into the head of the screw. The rod may be held by the rod holder so that the rod may be angulated as the rod is inserted into the screw heads. Once the rod is positioned in the screw heads, locking caps and/or set screws may be positioned over the rod and engage the screw heads so that the position of the rod may be fixed with respect to the screws. In some embodiments, a movement mechanism may be used to move the screws relative to each other to compress and/or distract the vertebrae. | 10-21-2010 |
20100298891 | Bone 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. | 11-25-2010 |
20100331899 | Surgical screw cartridge system for rapidly and accurately loading surgical screws onto a driver - A surgical screw cartridge system apparatus and method is provided wherein the cartridge has a body for storing a plurality of surgical screws. A spring-biased plunger is positioned within the body for presenting the surgical screws head first to a driver. A tab within the body prevents removal of the surgical screws from the body in absence of a screwdriver. | 12-30-2010 |
20110009911 | Locking polyaxial ball and socket fastener - The fastening system consists of the polyaxial ball and socket joint used in conjunction with a bone screw having threads on one end for use in anchoring to the spine and a spherical connector on the other end operating as a pivot point about which a connecting assembly moves in a polyaxial fashion. A substantially U-shaped connecting assembly has a lower receptacle that operates as a socket for housing an upper retainer ring and a lower split retaining ring. The socket is receptive to the spherical connector which is inserted through the lower split retainer ring causing a momentary displacement thereof which allows for the positioning of the spherical connector between the upper and lower retainer rings. 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 upper and lower retainer rings and the connector assembly. The polyaxial ball and socket can be locked into a fixed position. | 01-13-2011 |
20110093021 | Bone Anchor Assemblies and Methods of Manufacturing and Use Thereof - A bone anchor assembly includes a bone anchor having a proximal head and a distal shaft configured to engage bone, a receiver member for receiving a spinal fixation element to be coupled to the bone anchor, an insert positioned in the proximal end of the receiver member having a pair of spaced apart insert arms defining a recess therebetween, and a closure mechanism positionable between and engaging the insert arms to capture a spinal fixation element within the recess of the insert and fix the spinal fixation element with respect to the receiver member. | 04-21-2011 |
20110106178 | PEDICLE SCREW HEAD EXTENDER - The present invention relates to pedicle screw spinal rod connectors and more specifically, a pedicle screw head extender for use with a pedicle screw to ease connection to a spinal rod. The pedicle screw head extenders provided herein can be used with either fixed head pedicle screws or multi-axial head pedicle screws. The pedicle screw head extenders can either be threaded to or snapped into place within the various pedicle screws. It may also be possible to use the present invention with other types of spinal screws that may be connected to spinal rods without the screw actually being implanted through the pedicle of the spine. | 05-05-2011 |
20110106179 | Set Screw Having Variable Pitch Thread for Use With Spinal Implant Systems - An improved set screw for use with spinal implants to attach an elongated member to a bone. The set screw has a body with a lower portion. An external thread is on the lower portion wherein at least a portion of the external thread has a variable pitch. The set screw will engage a receiver member by a predetermined longitudinal distance before encountering the variable pitch of the external thread on the set screw. A preselected torque value for seating the set screw is achieved at this predetermined longitudinal distance of thread engagement by the set screw into the receiver member. The variable pitch provides consistent clamping force even when excessive torque is applied to the set screw. An upper portion can be connected to the lower portion of the set screw through a frangible portion. The preselected torque value for seating the set screw is selected at a value less than the break-off or separation torque required to cause the frangible portion to separate the upper portion from the lower portion of the set screw. | 05-05-2011 |
20110106180 | Implants With Adjustable Saddles - 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 engaging portion, a receiver, a saddle within a channel defined by the receiver, and an engaging member. The receiver extends along a central longitudinal axis and is fixed to the bone engaging portion. A rod or other elongated connecting element is received in a channel of the receiver in contact with the saddle, and the engaging member engages the connecting element against the saddle. 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 at any one of a plurality of angles of the connecting element through the receiver while the receiver and bone engaging portion remain fixed relative to one another. | 05-05-2011 |
20110106181 | ADJUSTABLE SADDLE FOR A BONE ANCHOR - A bone anchor is provided, which may be used in cervical, thoracic, lumbar or sacral areas of the spine or other orthopedic locations. The anchor includes an anchoring portion, a receiving portion, and an internal saddle that is rotatable with respect to the receiving portion at least to a degree. The anchoring portion is attachable to a bone. A rod or other elongated support member is received in the receiving portion in contact with the saddle. The rod and saddle may be rotated for variability substantially in a plane, and an engaging member is engaged to the receiving portion to lock the rod within the receiving portion. | 05-05-2011 |
20110118795 | Variable Angle Locking Buttress Pins - A buttress pin for fixing an implant to a bone, comprises a head at a proximal end, the head comprising a rounded outer profile and including first threading and a shaft extending distally from the head, the shaft including second threading extending over at least a portion of a length thereof, a position of a proximal end of the second threading along the shaft being spaced from a distal end of the first threading by a distance equal to a distance between a proximal end of a hole in an implant to be anchored to a bone via the buttress pin and a surface of the bone when the implant is in a target position on the bone. | 05-19-2011 |
20110125196 | CAM Lock Pedicle Screw - The present invention is directed to a pedicle screw fixation system which can be made for either posterior cervical, thoracic, lumbar spine, or elsewhere. With this type of system a surgeon can implant a pedicle screw system utilizing the same instrument set for an open or closed procedure. The system is designed to avoid cross threading and splitting of tulip heard by use of an outer threaded tulip and reducing donut. The system also provides the ability for superior angulation for hard to reach areas that are common in spinal procedures. The system allows for a bio-absorbable part (the reduction donut) that enhances fusion in the coming months after the procedure. With the elongate tulip portion of the system the user is able to avoid the need for other cannula type instruments; the need of additional parts; the need of additional instruments which could introduce bacteria into the patient and the need for fluoroscopy. The system is completely cannulated so as to permit a HOLDING wire driven procedure. The rods employed with these pedicle screws can be either flexible or rigid. Preferably a rod which is octagonal in cross section is employed with the system so as to prevent rotation in the tulip and slippage. | 05-26-2011 |
20110202095 | ANTI-SPLAY APPARATUS - An anti-splay apparatus having a bridge and frangible connection points for use with mechanical fasteners having a shank portion and a receiving member with opposing arms is provided. The bridge may take a number of forms including a ring, a notched ring, a tube, or a notched tube and the connection points join the opposing arms of the receiving member with the bridge. Also provided is the anti-splay apparatus also having tabs connected between frangible connection points. | 08-18-2011 |
20110208251 | Locking polyaxial ball and socket fastener - A polyaxial ball and socket joint that can be locked into a fixed position. The fastening system consists of the polyaxial ball and socket joint used in conjunction with a bone screw having threads on one end for use in anchoring to the spine and a spherical connector on the other end operating as a pivot point about which a connecting assembly moves in a polyaxial fashion. A substantially U-shaped connecting assembly has a lower receptacle that operates as a socket for housing an upper retainer ring and a lower split retaining ring. The socket is receptive to the spherical connector which is inserted through the lower split retainer ring causing a momentary displacement thereof which allows for the positioning of the spherical connector between the upper and lower retainer rings. | 08-25-2011 |
20110218580 | BONE FIXATION SYSTEM WITH CURVED PROFILE THREADS - A bone fastener for use in orthopedic surgery for fixing an implant to bone has a threaded or unthreaded shaft configured to engage bone and a head having a thread on an outer surface to engage the implant. The thread on the head of the fastener has a profile in cross section that includes peaks with a curved shape. | 09-08-2011 |
20110270326 | Locking Bone Screws and Methods of Use Thereof - The invention encompasses a bone screw for use in the human body including a shaft having a threaded region along at least a portion of its length and a screw head including a locking mechanism to secure the screw, for example to a bone plate. In certain embodiments, the thread has an outer diameter dimensioned to pass through the screw hole in the implant. The screw head is configured to cooperatively engage at least a portion of the screw hole of the implant so as to prevent the screw from coming out of the implant and avoided soft tissue damage and other complications associated with unintended screw removal. | 11-03-2011 |
20120046701 | SPINAL IMPLANT WITH A LOCKABLE BALL JOINT - A spinal implant ( | 02-23-2012 |
20120116464 | MULTI-THREAD BONE SCREW AND METHOD - A bone screw comprises a threaded shank including a distal end portion and a proximal end portion, and defining a first threaded section extending from the distal end portion toward the proximal end portion and adapted for anchoring in cancellous bone. A second threaded section extends contiguously from the first threaded section toward the proximal end portion The second threaded section has a finer thread pattern relative to the first threaded section. In one embodiment, the first threaded section includes a first helical threading defining a single lead thread pattern for anchoring in cancellous bone, and the second threaded section includes a second helical threading interleaved with the first threading to define a duel lead thread pattern for engagement in cortical bone. In a further embodiment, the bone screw includes a head portion extending from the threaded shank and configured for coupling to a spinal implant. | 05-10-2012 |
20120123486 | PEDICLE-SCREW ASSEMBLY - A pedicle-screw assembly has a screw having a threaded shaft extending along a screw axis and having a ball head. A body extending along a body axis is formed with an axially inwardly open screw-head seat in which the ball head can fit and with an oppositely axially outwardly open rod seat. A retainer fitted in the screw-head seat engages around the ball head and in the screw-head seat, and at least one pin extends radially of the body axis and seated in both the body and the retainer for pivoting of the retainer in the screw-head seat about a retainer axis substantially perpendicular to the body axis between a position with the body axis coaxial with the screw axis and a position with the body axis forming an acute axially outwardly open angle with the screw axis. The ball head is swivelable in the retainer.gget | 05-17-2012 |
20120277806 | Tulip Head Apparatus - A tulip head apparatus comprises a chuck housing configured to join to a head of a screw. Said chuck housing comprises an upward slot extending from a bottom for enabling said chuck housing to expand to enable entry of the head and to contract to retain the head. A plurality of downward slots extends from a top for enabling a portion of the chuck housing to contract and expand. A plurality of hook structures are disposed about said top. A rotating head comprises a hollow portion having a circular groove and to accept said chuck housing in which a contraction of said portion enables entry of said chuck housing and expansion of said portion engages said hook structures with said groove to secure said chuck housing within said rotating head and enable said rotating head to rotate about said chuck housing. | 11-01-2012 |
20120283789 | BONE ANCHORING DEVICE - A bone anchoring device includes a bone anchoring element having a shaft and a head; and a receiving part for coupling a rod to the bone anchoring element. The receiving part includes a first portion with a U-shaped recess for receiving the rod, and a second portion for accommodating the head, the second portion having a free end and being flexible so as to allow introduction and clamping of the head. The bone anchoring device also includes a locking ring embracing the second portion. The head is locked by means of exerting pressure with the rod onto the locking ring resulting in compression of the second portion of the receiving part and wherein the locking ring is mounted to the receiving part from the free end of the second portion. | 11-08-2012 |
20120303073 | METHODS OF USE OF A BOTTOM MOUNTED PEDICAL SCREW ASSEMBLY - 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. | 11-29-2012 |
20130030476 | BONE SCREW/DRIVER ASSEMBLY HAVING SURFACE ROUGHNESS - An assembly and method for attaching a medical device, or other structure, to a bone, according to which two projections are formed on one end of a driver that extend in two corresponding recesses, respectively, formed in the head of the screw to drivingly engage the driver and the screw. | 01-31-2013 |
20130030477 | RECEIVING PART FOR CONNECTING A SHANK OF A BONE ANCHORING ELEMENT TO A ROD AND BONE ANCHORING DEVICE WITH SUCH A RECEIVING PART - A receiving part for connecting a shank of a bone anchoring element to a rod. The receiving part has a first end, a second end and a recess having a substantially U-shaped cross section. The recess extends from the first end in a direction of the second end forming two legs open at the first end. The recess defines a channel to receive the rod. The channel has a longitudinal axis. The legs have an inner thread to receive a securing element having an outer thread cooperating with the inner thread. The legs are provided with stiffening structures. In one embodiment, the stiffening structures are formed by the wall thickness of the outer edges of the legs being larger than the wall thickness of the legs at a location closest to the central axis of the receiving part. | 01-31-2013 |
20130060294 | Bone Implants - Various bone fixation devices and methods of using the same are provided. In one embodiment, a spinal implant assembly is provided having a generally U-shaped rod-receiving head or receiver member, and a bone-engaging member extending distally from the receiver member. The receiver member can have two side arms extending proximally from a distal end, and the arms can define a U-shaped channel therebetween for receiving a spinal fixation element. The side arms of the receiver can have various configurations and can include a number of features to facilitate mating with a spinal tool. | 03-07-2013 |
20130079833 | BONE ANCHORING ASSEMBLY - A bone anchoring assembly for dynamic stabilization is provided. The bone anchoring assembly includes a bone anchoring element having a head and a shank to be anchored in a bone or a vertebra, a receiving part for receiving a rod, a pressure element and a monolithic locking element. The rod ( | 03-28-2013 |
20130085536 | BONE ANCHORING DEVICE AND TOOL COOPERATING WITH SUCH A BONE ANCHORING DEVICE - A bone anchoring device includes a receiving part including a rod receiving portion with a first end, a second end, and a U-shaped recess for receiving a rod, the recess defining two free legs, and a head receiving portion at the second end for introducing and clamping the head, and a locking ring configured to be arranged around the head receiving portion, the locking ring including an engagement structure for engagement with a tool, the engagement structure defining a width of the locking ring that is greater than a greatest width of the rod receiving portion, wherein the locking ring can assume a locking position exerting a greatest compressive force on the head receiving portion of the receiving part to lock an inserted head, and wherein the locking ring is movable out of the locking position towards the first end of the rod receiving portion. | 04-04-2013 |
20130090698 | STRIPPED PEDICLE SCREW DRIVER BIT - A pedicle screw driver bit includes an elongated shank and a head. The shank includes a plurality of threads. The head is connected to one end of and configured to rotate relative to the shank. The head is configured to be received by a tulip connected to a pedicle screw. The threads of the shank are configured to engage a plurality of threads of the tulip such that when the shank is rotated the tulip is drawn into engagement with the head such that the shank, the head, the tulip, and the pedicle screw are substantially prevented from rotating relative to one another. | 04-11-2013 |
20130096636 | Bone Screw - A bone screw is disclosed. A head includes a driver-receiving element formed thereon. A shank having a proximal portion, which is integrally connected to the head, and a distal portion maintains a constant diameter from the proximal portion to the distal portion. Three helical threads extend around the shank from the proximal portion to the distal portion. The three helical threads are symmetrically and helically aligned and advance uniformly along the length of the shank for each revolution to define a thread depth that remains constant along the length of the shank. The three helical threads respectively include three leads, which are offset by approximately 120° from each another. A tip is integrally connected to the distal portion of the shank and the tip intersects with a flute to define a self-tapping point. | 04-18-2013 |
20130103099 | POLYAXIAL BONE SCREW - The present invention generally provides a polyaxial fixation device having a shank with a spherical head formed on a proximal end thereof, and a receiver member having an axial passage formed therein that is adapted to polyaxially seat the spherical head of the shank. The polyaxial bone screw further includes an engagement member that is adapted to provide sufficient friction between the spherical head and the receiver member to enable the shank to be maintained in a desired angular orientation before locking the spherical head within the receiver member. | 04-25-2013 |
20130110180 | Top loading polyaxial ball and socket fastener with saddle | 05-02-2013 |
20130138162 | SCREW FOR FIXING VERTEBRA - A screw for fixing vertebra for letting a patient perform spinal motion more smoothly after a pedicle screw insertion surgery is disclosed. A head portion of the screw body is pivotally joined in sliding contact on the head seat portion of a movable washer, which is also pivotally joined in sliding contact on the washer seat portion of a fastening nut. A first aperture and a second aperture are formed in the fastening nut and movable washer respectively, and an elongating portion without a thread is formed between a screw portion and the head portion of the screw body. | 05-30-2013 |
20130197591 | SURGICAL 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. | 08-01-2013 |
20130211465 | PEDICLE SCREW ASSEMBLY AND METHOD OF ASSEMBLY - A pedicle screw assembly and method of assembly are disclosed. The pedicle screw assembly includes a bone fastener having a head at a proximal end and a threaded portion extending between the proximal end and a distal end. The assembly also includes a compression member having a conical inner surface and a locking member having an outer surface adapted to mate with the conical inner surface of the compression member. The assembly may also have an elongated member and a set screw that has a threaded portion. The assembly may also have a receiving housing having a central bore extending from a threaded proximal end to a distal end and a U-shaped cavity positioned perpendicular to the central bore and configured to receive the elongated member. | 08-15-2013 |
20130231708 | Bone 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. A threaded segment is located proximally of the pilot segment for fixedly securing the bone screw in the bone. A head is located proximally of the threaded segment for allowing a surgical rod to be fixedly secured to the bone screw. | 09-05-2013 |
20130253596 | TRIPLE LEAD BONE SCREW - Pedicle screw assemblies and related bone screws. In some embodiments, the bone screw may comprise a head portion and an axial shaft. The axial shaft may comprise a threaded portion comprising a triple lead thread disposed about the axial shaft. The axial shaft may further comprise a tapering portion and a non-tapering portion. The tapering portion may comprise multiple tapering portions tapering at differing rates, and may be positioned adjacent to a tip of the axial shaft. Each of the three leads may extend coextensively along at least a majority of the length of the axial shaft, the threaded portion, the tapering portion, and/or the non-tapering portion. | 09-26-2013 |
20130282065 | LOCKING 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. | 10-24-2013 |
20130296951 | POLYAXIAL 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. | 11-07-2013 |
20130325075 | Polyaxial bone screw assembly - A polyaxial bone screw assembly includes a 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 with a shaped wall, 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 and lock in recesses on interior of receiver. | 12-05-2013 |
20130331894 | Bone Screw Structure for a Minimally Invasive Surgery - A bone screw structure for a minimally invasive surgery contains: a body including a holder and an axial seat, the holder having a through hole and two first peripheral walls, each having first threads; the screwing nail being axially connected with the axial seat of the body and having an inner orifice. The each first peripheral wall of the holder including a second side face extending therefrom, between the each first peripheral wall and the second side face is defined a V-shaped slot, and the second side face has second threads. Thereby, the two first peripheral walls of the holder of the body include two second side faces extending therefrom, and between the two first peripheral wall and the two second side faces are defined two V-shaped slots to provide an easy operating space to the bone screw and to lower an area of an opening of a wound. | 12-12-2013 |
20140012333 | POLYAXIAL SCREW WITH MECHANICAL THREAD AND ITS FRICTION DEVICE - Disclosed is a polyaxial screw including a friction element ( | 01-09-2014 |
20140018866 | SURGICAL SCREW ASSEMBLY WITH INCREASED ARTICULATION - A system, method, and apparatus for a surgical screw with increased articulation. In one embodiment, the apparatus includes a saddle; a split collet; a fastener with a head that fits inside the split collet; a cage for housing the saddle and split collet. | 01-16-2014 |
20140018867 | PRECAUTION AGAINST JAMMING ON OPEN BONE SCREWS - In a bone screw ( | 01-16-2014 |
20140025124 | METACARPAL BONE STABILIZATION DEVICE - A device and method for stabilizing a broken bone while it heals is disclosed. The device is preferably a metal rod that has a threaded portion. The device is positioned into a bone, such as a metacarpal bone, by forming an opening in the bone suitable for receiving the device, and inserting it into the opening wherein the threaded portion retains the device in position. | 01-23-2014 |
20140046386 | Uniplanar Surgical Screw Assembly - Uniplanar surgical screw assemblies described include: a fastener including an elongate shaft; a saddle-shaped tulip having a tulip having a bore therethrough dimensioned to allow the distal end of the elongate shaft to pass therethrough, but to prevent passage of the head therethrough; and one or more features for limiting angular movement of the shaft, relative to the tulip, to one plane. | 02-13-2014 |
20140058458 | POLYAXIAL 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. | 02-27-2014 |
20140058459 | Pedicle Screw Fixation System and Method for Use of Same - A pedicle screw fixation system and method for use of the same are disclosed. In one embodiment, a tulip is provided for holding a head of a pedicle screw substantially along a longitudinal axis. The tulip includes opposing first and second U-shaped receiving slots aligned along a transverse axis. A rod is received by the opposing first and second U-shaped receiving slots. A coupling collar includes a plurality of resilient fingers circumferentially disposed therearound such that a snap fit engagement with the head of the pedicle screw formed. The coupling collar includes a first deformable face operable for contact with the rod. A set screw is for adapted for driving engagement through the tulip along the longitudinal axis such that a second deformable face is positioned for contact with the rod. The first and second deformable faces conform to the shape of the rod in response to forceful engagement therewith. | 02-27-2014 |
20140066998 | ASSEMBLY COMPRISING AN IMPLANTABLE PART DESIGNED TO BE FASTENED TO ONE OR MORE BONES OR BONE PORTIONS TO BE JOINED, AND AT LEAST ONE SCREW FOR FASTENING THE IMPLANTABLE PART TO SAID BONE(S) - An assembly including an implantable part designed to be fastened to at least one bone or bone portions to be joined and at least one screw for fastening the implantable part to the at least one bone or bone portions. The implantable part includes at least one tapped hole and the screw includes a head designed to be engaged in the tapped hole. The tapped hole is cylindrical and includes at least one radial notch emerging in a surface of the implantable part through which the screw is designed to be engaged in the tapped hole. The radial notch produces an interruption in the tapping included by the tapped hole. The head of the screw is conical, with an apical angle of between 15 and 25°. | 03-06-2014 |
20140094858 | MULTI-ROD BONE ATTACHMENT MEMBER - A fixation element for use in orthopedic surgery, particularly spinal surgery is disclosed. The fixation element is capable of being screwed, hooked, or otherwise attached to a bone, and is configured to accommodate two or more rods or other elongated members. The head of the fixation elements thus has multiple places for positioning a rod, either vertically or horizontally spaced from each other. | 04-03-2014 |
20140107712 | FUSION IMPLANT - Implants, instruments, and methods are presented for fixing adjacent bone portions to promote fusion of the bone portions. | 04-17-2014 |
20140142641 | Locking Bone Screws and Methods of Use Thereof - The invention encompasses a bone screw for use in the human body including a shaft having a threaded region along at least a portion of its length and a screw head including a locking mechanism to secure the screw, for example to a bone plate. In certain embodiments, the thread has an outer diameter dimensioned to pass through the screw hole in the implant. The screw head is configured to cooperatively engage at least a portion of the screw hole of the implant so as to prevent the screw from coming out of the implant and avoided soft tissue damage and other complications associated with unintended screw removal. | 05-22-2014 |
20140172024 | MINIMAL INCISION REMOVABLE BONE SCREW, DRIVER, AND METHOD OF USE - A surgical bone screw | 06-19-2014 |
20140194936 | UNDERCUT SCREW FEATURE AND DRIVER - A driver including a handle, lever, swivel cap, shaft, and a tip mechanically connected to the lever configured to engage a screw. Engaging the lever causes the tip to either compress or expand so as to lock the screw to the driver. According to one exemplary embodiment, the cap can be translated releasing the lever, thereby releasing the screw from the tip. According to one embodiment, the cap is a swivel cap allowing for jeweler style use. Advantages of the present system and method, according to various embodiments, include a tip compressing a feature that is within an outer diameter of the screw allowing a driver, or a portion thereof, to have a maximum diameter equal to or smaller than the maximum diameter of a screw. | 07-10-2014 |
20140236247 | SURGICAL IMPLANT SYSTEM AND METHOD - A surgical implant driver includes a member defining an engagement portion including a wall having a circumference and a plurality of lobes disposed thereabout. The lobes are curved toward an interior of the circumference and are connected by a plurality of arcuate portions that are curved toward the interior of the circumference. | 08-21-2014 |
20140249590 | BONE ANCHOR WITH LOCKING CAP AND METHOD OF SPINAL FIXATION - A bone anchor ( | 09-04-2014 |
20140257412 | BONE COMPRESSION SCREW - A system for orthopedic repair of bones, the system may include a compression screw. The screw may include a blunt tip on one end with tapped threads to allow for greater bone fixation uniform across a threaded portion of the screw. The screw may also include springs, which may be Belleville washers, which provide appropriate compression and tension and prevent excessive loosening of the screw after surgery. The springs allow the screw to retract without losing pressure on the fracture site. The system may be minimally invasive for multiple fractures on a single bone such as calcaneal fractures, and stabilizing long bone fractures without bone plates. | 09-11-2014 |
20140277190 | COMPRESSION SCREW WITH VARIABLE PITCH THREAD - A bone screw apparatus is provided for threaded engagement with a bone and, optionally, a medical device such as a bone plate. The bone screw has a shaft having a first end, a second end, and a first thread having a first pitch. The screw further includes a head having a proximal end, a distal end adjacent the shaft first end, and a second thread having a second pitch. The second thread has a variable pitch that increases in a proximal direction, but never exceeds the magnitude of any portion of the first pitch. Upon threaded engagement of the head with bone or a medical device, a compression force is generated which continuously decreases as the screw is further inserted. | 09-18-2014 |
20140277191 | ARTHRODESIS DEVICE AND METHOD OF USE - A fastening device for compressing first and second bones together includes a first member configured to extend entirely through the first bone and having a shaft that includes a distal threaded portion and an unthreaded portion. The threaded portion has an outer diameter that is not larger than the diameter of the unthreaded portion. A second member has a first threaded portion for securing to the second bone and a second threaded portion for engaging the threaded portion of the first member while the first member extends entirely through the first bone to secure the first and second members together and compress the first and second bones. | 09-18-2014 |
20140303678 | ANTI-SPLAY APPARATUS - An anti-splay apparatus having a bridge and frangible connection points for use with mechanical fasteners having a shank portion and a receiving member with opposing arms is provided. The bridge may take a number of forms including a ring, a notched ring, a tube, or a notched tube and the connection points join the opposing arms of the receiving member with the bridge. Also provided is the anti-splay apparatus also having tabs connected between frangible connection points. | 10-09-2014 |
20140324109 | Securing 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. | 10-30-2014 |
20140336714 | METHODS FOR CONNECTING A LONGITUDINAL MEMBER TO A BONE PORTION - An apparatus ( | 11-13-2014 |
20150119945 | SET SCREW TO MINIMIZE SPLAYING IN PEDICLE SCREWS - A bone screw assembly including a bone screw that has a head portion with a base, a pair of arms extending upwardly from the base, and an internally threaded slot defined by the pair of arms, and a screw portion extending downwardly from the base of the head portion. The assembly further includes a set screw having a body with a threaded outer surface and a distal tip, wherein the distal tip comprises a truncated taper portion extending from a base to generally flat distal end. The threaded outer surface of the set screw is engageable within the internally threaded slot of the head portion of the bone screw. | 04-30-2015 |
20150320465 | BONE FASTENER AND METHODS OF USE - A bone fastener includes a first portion that defines a longitudinal axis and includes an inner surface defining an implant cavity. An intermediate portion includes a first part having a wall including a first end surface that defines at least a portion of the implant cavity and a second end surface. The intermediate portion further includes a second part having a wall including an end surface connected with the second end surface of the first part and an inner surface. The second part is rotatable relative to the first part. A second portion includes a first end engageable with the inner surface of the second part and a second end configured to penetrate tissue. Systems and methods are disclosed. | 11-12-2015 |
20150320466 | IMPLANT FIXATION ASSEMBLIES HAVING A SCREW AND C-SHAPED FIXATION COLLAR - A system for anchoring implants to bones comprises a screw and fixation collar that when connected together inhibit axial movement of the screw and that when connected to an implant with a compatibly shaped aperture inhibit the screw's ability to back out from the bone and back out from the implant. The fixation collar includes a substantially C-shaped configuration partially surrounding a void, with first and second ends defining a gap that is slightly narrower in width than the diameter of the screw and being partially flexible to allow compression and expansion of the fixation collar to snap fit the collar around the screw. | 11-12-2015 |
20160008045 | RESORPTIVE INTRAMEDULLARY IMPLANT BETWEEN TWO BONES OR TWO BONE FRAGMENTS | 01-14-2016 |
20160022341 | Pedicle Screw Assembly - A pedicle screw assembly includes a threaded shank portion formed from a polymer material and a head assembly. The head assembly includes a tulip having extending arms, the tulip engaging a reaction bar such that loads applied to the pedicle screw assembly can be transferred to another pedicle screw assembly in order to immobilize a section of a spinal column. | 01-28-2016 |
20160095639 | WASHER ASSEMBLY FOR SPINAL FIXATION SCREW - A washer for use with a bone screw having a shank and a head defining a maximum diameter, includes a body having a bottom face for engaging the surface of a bone and an opening therethrough sized to receive the shank of a bone screw extending therethrough. The washer includes a cavity in communication with the opening at the bottom face and configured to receive the head of the bone screw when the shank extends through the opening at said bottom face. The washer includes a plurality of flaps distributed around the opening of the cavity that are bendable from a first configuration in which the flaps define an opening sized to receive the head of the bone screw, to a second configuration in which the flaps define an opening smaller than the maximum diameter of the head of the bone screw. | 04-07-2016 |
20160106486 | INTERMAXILLARY FIXATION DEVICE AND METHOD OF USING SAME - A medical apparatus including a bar with a first attachment loop, a second attachment and a plurality of hooks, wherein the medical apparatus is an arch bar. | 04-21-2016 |
20160113693 | MULTI-THREAD BONE SCREW AND METHOD - A bone screw comprises a threaded shank including a distal end portion and a proximal end portion, and defining a first threaded section extending from the distal end portion toward the proximal end portion and adapted for anchoring in cancellous bone. A second threaded section extends contiguously from the first threaded section toward the proximal end portion. The second threaded section has a finer thread pattern relative to the first threaded section. In one embodiment, the first threaded section includes a first helical threading defining a single lead thread pattern for anchoring in cancellous bone, and the second threaded section includes a second helical threading interleaved with the first threading to define a duel lead thread pattern for engagement in cortical bone. In a further embodiment, the bone screw includes a head portion extending from the threaded shank and configured for coupling to a spinal implant. | 04-28-2016 |
20160113694 | SURGICAL INSTRUMENT AND METHOD - A surgical connector is provided. The connector includes a first member including a mating surface engageable with an implant and a locking element and a second member translatable relative to the first member to urge the locking element into engagement with the implant. At least one of the members is connectable with a surgical instrument. Systems and methods of use are disclosed. | 04-28-2016 |
20160151101 | MEDICAL SCREW, AND EXTRACTION JIG FOR MEDICAL SCREW | 06-02-2016 |
20160166286 | UNIPLANAR BONE ANCHOR SYSTEM | 06-16-2016 |