Abstract: An apparatus for the preparation of a cement-free implantation of a prosthesis is provided. The prosthesis has a distal part corresponding to a diaphysial region of the femur, a proximal part corresponding to a metaphysial region of the femur, and an intermediate region which corresponds to a metaphysial-diaphysial region. The apparatus includes a rasp of modular design including a conical distal part and first and second proximal parts of substantially different basic shapes and heights. The apparatus also includes a releasable connection means at the distal part for connecting a proximal part to at least one distal part. The apparatus also includes a neutral intermediate element mountable on the distal part of the rasp for driving it and for measuring its degree of recessing on a graduated scale.

Abstract: The invention relates to an instrument system for pedicle screws having a thread in their head which has a clamping screw in the direction of their screw axes, which can be actuated by a power screw driver, with holders for the absorbing of a torque contacting the head of the pedicle screw in a shape matched manner. Since the holders have a tubular part which is coordinated with its inner diameter to the guiding of the clamping screw and with centring parts being able to be fastened in the heads of the pedicle screws instead of the clamping screws, said pedicle screws being engageable when the holder is mounted on, the contact to the inserted pedicle screw can also be maintained with a non visible, i.e. smaller operation field, in order mount the same holder or other holders a plurality of times.

Abstract: The invention relates to a shoulder joint prosthesis comprising two cooperating bearing bodies, a shaft and a coupling for the connection of the shaft to one of the bearing bodies, with a support member adjoining the lower side of the bearing member connectable to the shaft, an outer support surface of said support member at least partly filling a gap present between the bearing body and the shaft in the state connected to the shaft such that the growing together of bone fragments is promoted.

Abstract: A shoulder joint prosthesis is shown having two bearing bodies (1, 2; 11, 12) which slide on one another and which can be respectively connected to the upper arm (3) by a shaft (5) and to the shoulder bone (4) by a platform (6). When the connection to the shaft (5) is brought about by a non-rotationally symmetrical, conical body (7) with a self-locking seat, with its periphery (8) being form matched to a mating shape (15) in the shaft (5) which is rotationally fixed relative to a longitudinal axis (9) arid keyed by the taper so that the connection is releasable and repeatedly fixable in the same angular position, large forces can be transmitted by the connection.

Abstract: The invention relates to an adjustment apparatus for the selection of suitable implant sizes in knee operations having a lower work unit supportable at the tibia and an upper work unit supportable at the femur, which are vertically adjustable relative to one another and with which the spacing between the tibia and the femur can be set by spreading apart the knee, wherein the upper work unit includes a carrier vertically adjustable to the lower work unit and at least two different functional units which are releasably conducted to the carrier and of which the one is designed as an extension unit serving for the spreading apart of the knee with the femur in extension and the other is designed as a flexion unit serving for the spreading apart of the knee and for the selection of a suitable implant size with the femur in flexion, wherein the flexion unit includes a base unit couplable to the carrier and a central guide piece which can be suspended at the femur and which can alternatively be brought into a conditi

Abstract: The invention relates to a hydraulic traction apparatus for surgery, in particular for knee surgery, having at least one pair of working sections which can be adjusted relative to one another and at least one exchangeable piston in cylinder arrangement made of plastic whose piston is releasably coupled to the one working section and whose cylinder is releasably connected to the other working section and which is stiffened by an outer support mount supporting the cylinder from the outside and by at least one inner reinforcement insert which can be inserted into the cylinder together with the piston.

Abstract: The invention relates to a screw-driving tool for implant screws having an elongate handle (2) and having a bar-shaped tool which is anchored in the elongate handle (2). An elastic, hollow spiral (10) is provided for the transmission of a pre-determined torque, with a bar (3) being guided through the spiral (10) and being fixedly connected to the rotatable side of the spiral and indicating a rotational angle or a torque respectively at the opposite side.

Abstract: A kit for a knee joint prosthesis includes a tibia part, a femur part and a meniscus part which is to be arranged between the femur part and the tibia part. The kit enables the assembly of different prosthesis types, namely of prostheses in which the meniscus part is arranged to be immobile relative to the tibia part and of prostheses in which the meniscus part is arranged so as to be movable relative to the tibia part. The kit includes a plurality of guiding elements which are formed in such a manner that the respective guiding element is in engagement with the tibia part and with the meniscus part when the prosthesis is assembled and determines the movability of the meniscus part relative to the tibia part.