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Arnold Keller, Kayhude DE

Arnold Keller, Kayhude DE

Patent application numberDescriptionPublished
20080221576Insertion Instrument for an Endoprosthesis Comprising a Prosthesis Shaft Which is to be Inserted into a Medullary Cavity - The invention relates to an insertion instrument for an endoprosthesis (09-11-2008
20080312745ENDOPROSTHESIS WITH CONVEX CONFIGURATION - The invention relates to an endoprosthesis for replacement of a joint, in which slide surfaces that have different contours and correspondingly define movement planes for bearing are formed by an intermediate part. According to the invention, the intermediate part has a projection, preferably a convex projection, on at least one side face, in order to avoid fibrosis.12-18-2008
20090182341INSTRUMENT SET FOR FITTING AN INTERVERTEBRAL JONT PROSTHESIS - An instrument set for fitting an intervertebral prosthesis includes a guide device for an instrument or a prosthesis part, which guide device is to be secured on at least one vertebral body. In order to attach the guide device precisely on the vertebral bodies despite difficult operating conditions, an adjustment instrument is provided which positions the guide device when this is being arranged on the vertebral body. This adjustment instrument may include an intervertebral plate which is fitted into the intervertebral space so as to be positioned exactly in relation to the vertebral bodies.07-16-2009
20090281550INSERTION INSTRUMENT FOR JOINT SOCKETS OF PROSTHESES - An insertion instrument comprising an elongate shaft, a suction head provided at the front end thereof for connection to a joint socket, a suction device with a piston guided in the shaft, a suction line opening out at the suction head, and an actuating element which is guided along a guiding track on the shaft. The guiding track can be helically shaped and have a locking arrangement, preferably in the form of a recess, for the actuating element in a suction position. Due to the helical shape of the guiding track, the actuating element executes a rotational and longitudinal movement during its displacement. The longitudinal movement produces a negative pressure in the suction line ensuring maintenance of the pressure, while the rotating movement causes rotation of the actuating element such that it reaches its locking position at the end of the guiding track, providing simplified handling of the instrument.11-12-2009
20100030223MODULAR PATELLA INSTRUMENT - An instrument for implanting patellar prostheses in various sizes includes a series of milling calipers of various sizes, a retaining instrument with a receptacle for one of the milling calipers matching the sizes of the patellar prostheses and milling bodies in various sizes. The retaining instrument is configured like forceps with two members, the front end of one of the members being provided with a retention plate for engagement with a front face of a patellar prosthesis, and the front end of the other one of the members being provided with a holder for a milling gauge.02-04-2010
20100082112Finger Joint Prosthesis - A finger joint prosthesis is provided including a joint body having first and second joint elements, which are connected together pivotably about a rotary axis and from each of which extends an anchoring bar for fixing to a proximal and/or distal phalanx. The anchoring bars have eyes with openings for receiving fixing screws. To increase stability, it is proposed that the first joint element have an external hollow body with an insertion opening that the second joint element have an internal hollow body, and that the internal hollow body in the position of installation can be inserted by way of the insertion opening relatively movably into the external hollow body. A spindle can be inserted in the position of installation into the internal hollow body for rotationally movable connection to the external hollow body.04-01-2010
20100131066PROSTHESIS FOR BRIDGING A VERTEBRAL BODY - A prosthesis for the partial replacement of a vertebral body includes an upper contact plate for connection to an upper vertebral body, a lower contact plate for connection to a lower vertebral body and a bridging part which connects the upper and lower contact plates to one another and bridges at least one intermediate vertebral body which is located between the upper and lower vertebral bodies and is to be partially replaced. The bridging part is accommodated in a recess in the vertebral body and is secured in the recess with lateral anchoring projections which penetrate into the bone substance located on both sides of the bridging part. The cross section of the bridging part may narrow toward the rear, preferably in a trapezoid shape.05-27-2010
20100191334INTERVERTEBRAL PROSTHESIS WITH SELF-TAPPING FIXING PROJECTIONS - An intervertebral prosthesis, in particular for the cervical spine, has two attachment plates connected in an articulated manner. The attachment surfaces of the attachment plates, which are configured for attachment to adjacent vertebral bodies have a base surface configured to bear on the surface of the vertebral bodies, and self-tapping fixing projections rising from the base surface. These fixing projections are formed by at least one pair of ribs which extend in opposite directions obliquely with respect to a predetermined implantation direction and whose side faces oriented more away from the implantation direction are steeper than their side faces oriented more in the implantation direction. The ribs can be toothed.07-29-2010
20100198355ANKLE-JOINT ENDOPROSTHESIS - An endoprosthesis for replacing the ankle joint includes a lower component which is configured to be connected to the ankle bone, an upper component which is configured to be connected to the shin bone, and an intermediate part which forms a slide joint both with the lower and upper components. The intermediate part, which is wedge-shaped in sagittal section, is provided in order to compensate for anatomical or surgical irregularities. The upper component can also be wedge-shaped in frontal or sagittal section.08-05-2010
20100204799ENDOPROSTHESIS WITH INTERMEDIATE PART - An endoprosthesis for replacement of a joint includes two slide surfaces having different contours and correspondingly determining movement planes for a bearing formed by an intermediate part. The endoprosthesis includes a clamping bracket to enclose the slide surfaces of the intermediate part that is arranged thereon such that it is free from the movement planes defined by the slide surfaces having different contours. It is thus possible to strengthen endoprostheses which have complex biomechanics having a plurality of degrees of freedom.08-12-2010
20100217398Intervertebral Disc Prosthesis - An intervertebral disc prosthesis has two cover plates and a prosthesis core which is connected to one of the cover plates by connection profiles on one of the cover plates which are undercut in a complementary manner and include at least one pair of profile sections which are symmetrical with respect to the AP (anteroposterior) direction of the prosthesis in its implanted position and are arranged at an angle to one another.08-26-2010
20110152955Bone Separator - A bone spreader includes two tubular pin holders which are connected to one another by a parallel guide system, and two pins that are configured to be connected to the bone parts that are to be spread apart. In order to give the bone parts that are to be spread apart a more secure position in relation to one another, at least one of the pin holders is provided with a locking device for a pin located in the pin holder. This locking device includes a locking finger which is movable tangentially with respect to the pin holder and which, in the locking position, engages in a transverse groove of the associated pin and can be formed by a pivotably mounted hook.06-23-2011

Patent applications by Arnold Keller, Kayhude DE