Abstract: A cervical intervertebral disk prosthesis has two cover plates, at least one of which is provided with a wedge-shaped connection surface for connection to a vertebral body and which is wider than it is deep. The dorsal edge of the connection surface may be set back from the dorsolateral edge of the cover plate having the connection surface and be connected to the dorsal edge protruding above it via a rounding or bevel.

Abstract: Prosthesis for the partial replacement of a vertebral body, with an upper contact plate (5) for connection to an upper vertebral body (1), a lower contact plate (6) for connection to a lower vertebral body (2), and a bridging part (7) which connects the upper and lower contact plates (5, 6) to one another and bridges at least one vertebral body (3) which is located between the upper and lower vertebral bodies (1, 2) and is to be partially replaced. The bridging part (7) is accommodated in a recess in the vertebral body (3). To be secured in said recess, it has lateral anchoring projections (9) which penetrate into the bone substance located on both sides of the bridging part (7). Its cross section narrows toward the rear preferably in a trapezoid shape.

Abstract: A prosthesis for partial replacement of a vertebral body includes upper and lower contact plates that contact upper and lower vertebral bodies and a bridging element to be inserted into a bone cavity that bridges an intermediate vertebral body to be replaced that lies between the upper and lower vertebral bodies. This bridging element has anchoring projections which can be moved between a retracted implantation position and a protruding anchoring position.

Abstract: A hip prosthesis includes a shaft which is configured to be anchored in the medullary canal of a femur and whose distal portion, which is to be anchored in the diaphysis, has a core cross-section which tapers toward the distal end and which, at least on the lateral side and medial side, has longitudinal ribs whose height increases from proximal to distal.

Abstract: An intervertebral prosthesis, in particular for the cervical spine, includes a first cover plate to be connected to a first vertebral body, a second cover plate to be connected to the second vertebral body, and a prosthesis core which forms an articulation with the second cover plate. The prosthesis core is held by a seat of the first cover plate which is designed as a guide device. The core can be pushed into the guide device from the ventral side in the anterior-posterior (AP) direction relative to the first cover plate. A limit-stop plate is provided on the ventral edge of the first cover plate. This limit-stop plate is displaceable in a slide guide between a locking position and a nonlocking position.

Abstract: A knee prosthesis with a flexion hinge which is formed by a hinge fork with two branches lying opposite each other, by a center part which is to be fitted in the hinge fork transversely with respect to the flexion axis of the latter, and by a hinge pin which, after the center part has been fitted into the hinge fork, is to be mounted, by movement in its longitudinal direction, in aligned hinge bores of the hinge fork and of the center part. So as not to have to push the pin into the prosthesis from the outside, it is formed by two pin stumps which, in an assembly position, are arranged inside the center part and, in a mounted position, partially protrude from the latter.

Abstract: An insertion instrument for a multi-part intervertebral endoprosthesis includes two closure plates and a sliding core arranged between these, said insertion instrument having a handgrip part, gripping members which hold the closure plates between them, and a force-receiving part for applying an insertion force to the intervertebral endoprosthesis, the gripping members being guided movably toward and away from one another via a hinge and being able to be tensioned against the intervertebral endoprosthesis, projections pointing in the tensioning direction or recesses for holding the intevertebral endoprosthesis with form-fit being provided on the gripping members, and a block guided in the longitudinal axis direction and with an abutment surface being provided which can be moved by means of an actuating device so as to bear on the intervertebral endoprosthesis and, in its forward position, secures the intevertebral endoprosthesis against the projections or recesses.

Abstract: A hip prosthesis includes a straight shaft which is to be inserted into the femur, the straight shaft including a proximal part that is configured to be inserted in the metaphyseal region of the femur. The proximal part has, on each of its front and rear faces, at least one projecting fin with a steep medial flank that deviates at least over part of its length away from the longitudinal direction of the shaft. At its top the proximal part is inclined toward the femoral neck. In this way, when the shaft is driven into the bone, the bone substance surrounding the fin is compacted and is able to absorb greater forces. The height of the fin decreases from its medial flank toward its lateral edge.

Abstract: A device for implanting a cervical prosthesis includes a cervical prosthesis, an insertion instrument, and a holder which facilitates the connection of the gripping members of the insertion instrument to the prosthesis. The holder receives the prosthesis with an exact fit and has, on the anterior face of the prosthesis, an opening for admission of the gripping members of the insertion instrument. The opening contains guide elements for guiding the gripping members of the insertion instrument into a removal position in which the complementary projections and recesses of the gripping members and of the prosthesis lie opposite one another.

Abstract: A cervical vertebral prothesis includes a central part for bridging a central vertebral body and two outer prothesis parts which are engaged above and below the central vertebral body and are configured to be connected to vertebral bodies located above and below the central veterbral body. In order to secure both stability and mobility of the articulation of the assembled prosthesis, the central vertebral body is fixed to one of the outer prosthesis part and connected via a hinge to the other of the outer prothesis parts.

Abstract: An intervertebral prosthesis, in particular for the cervical spine, includes a first cover plate to be connected to a first vertebral body, second cover plate to be connected to the second vertebral body, and a prosthesis core which forms an articulation with the second cover plate. The prosthesis core is held by seat of the first cover plate which is designed as a guide device. The core can be pushed into the guide device from the ventral side in the anterior-posterior (AP) direction relative to the first cover plate. A limit-stop plate is provided on the ventral edge of the first cover plate. This limit-stop plate is displaceable in a slide guide between a locking position and a nonlocking position.

Abstract: A knee prosthesis includes a femoral prosthetic part which forms a pair of condylar gliding surfaces, a tibial part that has tibial gliding surfaces cooperating with the condylar gliding surfaces and a coupling part that connects the femoral and tibial parts so that they can rotate about a rotational axis that is approximately parallel to the axis of the tibia. If the femoral and tibial parts have the same anteroposterior alignment, an applied load is borne by a central region of the tibial gliding surfaces. The tibial gliding surface slopes upwardly relative to the prosthesis both in front of and behind the central region of the tibial gliding surface so that when the femoral and tibial parts rotate against one another, each of the condylar gliding surfaces remains in contact with its corresponding tibial gliding surface.

Abstract: Cervical prosthesis consisting of a lower cover plate (10) which is to be connected to a lower vertebral body, an upper cover plate (11) which is to be connected to an upper vertebral body, and a prosthesis core (12) which forms a hinged connection between the upper cover plate and lower cover plate. The bottom surface of the lower cover plate (10) is substantially flat. The top surface (14) of the upper cover plate (11) is convex at least in sagittal section.

Abstract: A surgical implant or instrument has two parts, one sliding on the other, the lower part being provided with a threaded bore and the upper part being provided with a passage orifice for receiving a fixing screw. The set screw can be received over its entire length beneath the upper part in the threaded bore and includes, at its upper end, a dog point which is thinner than its threaded part and which is provided with a slit, groove or hexagon socket for a screwdriver, the diameter of the passage orifice being smaller than that of the threaded part and larger than that of the dog point. An elastic device is provided for the implant or instrument which pushes the fixing screw into the fixing position.

Abstract: An instrument for inserting an intervertebral prosthesis, comprising two prosthesis holders which are connected by a parellel guide and can be spread apart from one another and are intended to receive a pair of prosthesis plates. The first prosthesis holder is arranged fixedly on an elongate instrument body. The second prosthesis holder is held from the instrument body by means of a parallel guide. The parts connecting the second prosthesis holder to the instrument body or to the first prosthesis holder delimit on both sides a central through-opening which extends like a channel in the longitudinal direction of the instrument body and whose width corresponds at least to the transverse dimensions of a prosthesis core, to be inserted between the prosthesis plates, and of the prosthesis core holder provided for this.

Abstract: Medical implant with a secured bone screw (4) which is guided through a bore (3) of the implant (1, 2). The bore (3) has a thread matching the thread of the screw. Between its head and head (6) and the thread (5), there is an unthreaded portion (10) whose diameter is not greater than the free diameter of the threaded bore (3). These threads prevent an axial passage of the screw through the bore without turning. Turning is inhibited or excluded by an arrangement (15, 16) preventing turning.

Abstract: Surgical instrument for grinding the cotyloid cavity, comprising an instrument head (3) and a drive shaft (5). In order to offer easier access during a minimally invasive operation, the drive shaft (5) including an optionally provided shank (4) is located at an angle with respect to the rotation axis (12) of the instrument head (3). In order to facilitate the alignment of the instrument head (3) and the exertion of the advancing force, a handle can be provided that is located in the direction of the rotation axis (12) of the instrument head (3) but is connected to the instrument head (3) or to the shank (4) at a location outside of this axis (12).

Abstract: A device for implanting a cervical prosthesis includes a cervical prosthesis, an insertion instrument, and a holder which facilitates the connection of the gripping members of the insertion instrument to the prosthesis. The holder receives the prosthesis with an exact fit and has, on the anterior face of the prosthesis, an opening for admission of the gripping members of the insertion instrument. The opening contains guide elements for guiding the gripping members of the insertion instrument into a removal position in which the complementary projections and recesses of the gripping members and of the prosthesis lie opposite one another.

Abstract: Insertion instrument for a pair of sliding prostheses, said instrument having, on a support plate (2), two clamps (4) which are arranged at a predetermined spacing from one another and receive the sliding prostheses (5). The clamps (4) are connected to the support plate (2) via a releasable coupling (13, 15). This coupling is provided in any position in the LM direction, i.e. the clamps (4) can adopt different positions in the LM direction. They are clamped securely in the respectively chosen position by a fixing means.

Abstract: An endoprosthesis for replacement of the ankle joint includes a component which is to be connected to the anklebone and which forms an upper slide surface a component which is to be connected to the tibia and which forms a lower slide surface, and a middle part. The middle part forms two slide surfaces which interact with slide surfaces on the tibial component and the anklebone component. In frontal section, the middle part is wedge-shaped with a wedge angle of between 1° and 12°.