Abstract: An artificial joint as an endoprosthesis for a human joint, including a first joint part having two first functional surfaces, a second joint part having two second functional surfaces, the two first and second functional surfaces of each joint part being convex-concave, concave-convex, or convex-convex in a proximal-distal direction, a projection associated with the first joint part; and a recess associated with the second joint part. The recess is configured to engage with the projection so as to determine a relative position of the first and second joint parts in a transverse plane of the joint and to form a stop for a sliding movement of the first and second joint parts relative to each other. The two first functional surfaces are pivotable about a pivot axis with respect to the second functional surfaces.

Abstract: A device configured in the form of an exoprosthesis or orthosis for stabilizing a human knee includes a femur part associated with a thigh and configured to be affixed to the thigh a tibia part associated with a lower leg and configured to be affixed to the lower leg, and a joint connecting the femur part to the tibia part. The joint is configured so that, during a flexing motion of the knee from a straight position to a flexed position, an instantaneous center of rotation of the joint moves along a curved centrode of the tibia having a vectorial vertical component and a vectorial sagittal component, the vectorial saggital component runs from posterior to anterior relative to the femur part.

Abstract: An artificial joint as an endoprosthesis for a human joint, including a first joint part having two first functional surfaces, a second joint part having two second functional surfaces, the two first and second functional surfaces of each joint part being convex-concave, concave-convex, or convex-convex in a proximal-distal direction, a projection associated with the first joint part; and a recess associated with the second joint part. The recess is configured to engage with the projection so as to determine a relative position of the first and second joint parts in a transverse plane of the joint and to form a stop for a sliding movement of the first and second joint parts relative to each other. The two first functional surfaces are pivotable about a pivot axis with respect to the second functional surfaces and each of the first functional surfaces rolls and slides with respect to the second functional surfaces during an extension or flexion of the artificial joint.

Abstract: A device for temporary fixation of parts of a human joint includes two holding elements disposed opposite one another and a releasable fixing device configured to fix in place a respective joint part of the human joint between the two holding elements. In addition, the device includes a support surface configured to support a distal joint part and a proximal joint part, a guide configured to position and to limit a relative movement of at least one of a surgical instrument and a surgical aid, and a receiving means for receiving the guide.