Abstract: The invention relates to an operation system for a joint prosthesis, in particular a shoulder joint prosthesis, having two cooperating bearing bodies, in particular a joint head and a joint shell, a shaft and a coupling to connect the shaft to one of the bearing bodies comprising a positioning device by means of which the shaft can be positioned at a desired depth in the bone without a coupling, a prefixing device by means of which the desired position of the bearing body relative to the coupling can be pre-fixed at the shaft positioned at the desired depth; and a final fixing device by means of which, with the coupling removed from the shaft, the pre-fixed desired position can be finally fixed.

Abstract: The invention relates to a drilling jig for the determination of the axis of a femur head prosthesis. A guide tube (6), around whose longitudinal axis (14) a sensing probe can be rotated, has a rounded head (7) which is supported in a housing (3) pivotable in all directions and fixable by first clamping elements (5), in order to fix its longitudinal axis in a desired angle. The housing (3) is displaceable in all directions transversely to its longitudinal axis with respect to a base part (1) which can be anchored to the femur head (10) and fixable by two clamping elements (4) in order to define the position of the longitudinal axis (14) of the guide tube (6) by rotation of a sensing probe around this longitudinal axis (14) relative to the cross-section of the femur neck (16).

Abstract: The invention relates to a ball draw-off apparatus for shaft prostheses with balls (3) which can be placed onto the prosthesis neck (2). The apparatus has two rotary bodies (5a, 5b) which are rotatably supported in a housing (4), which can in each case be rotated with a lever arm (6a, 6b) and which with their axes of rotation (7a, 7b) lie in a common plane and form an open gap S in the projection onto the plane F for the introduction of the prosthesis neck (2). The rotary bodies have a profile which with increasing rotation decreases the gap S for clamping the prosthesis neck (2) and causes an increase of the distance of its upper edge (9a, 9b) from the plane F in order to produce a draw-off force P at the placed on ball directly or indirectly via an intermediate body.

Abstract: The invention relates to a drilling jig for the determination of the axis of a femur head prosthesis. A guide tube (6), around whose longitudinal axis (14) a sensing probe can be rotated, has a rounded head (7) which is supported in a housing (3) pivotable in all directions and fixable by first clamping elements (5), in order to fix its longitudinal axis in a desired angle. The housing (3) is displaceable in all directions transversely to its longitudinal axis with respect to a base part (1) which can be anchored to the femur head (10) and fixable by two clamping elements (4) in order to define the position of the longitudinal axis (14) of the guide tube (6) by rotation of a sensing probe around this longitudinal axis (14) relative to the cross-section of the femur neck (16).

Abstract: An instrument (1) for the introduction of an inlay (E) of an implant, in particular of an artificial hip joint socket (HP), into the associated shell (S) of this implant, comprises a bar (2) which has a holder (5) at its distal end for holding the inlay (E) firmly. Furthermore, it comprises an actuating member (3, 30) for releasing the inlay (E) into the shell (S). The holder apparatus (5) comprises at least three resilient lamella (50) which point in the axial direction, are arranged in such a manner that their free ends point away from the bar (2) and are shaped in such a manner that they form a snap connection together with the inlay (E) when holding the inlay (E).