Abstract: An endoprosthesis for replacing at least part of a tibia, includes an elongate shaft extending longitudinally in the direction of a lower leg and having an upper end facing a knee joint and a lower end facing a natural talus. An endoprosthetic knee joint having a tibial plateau is secured to the upper end of the shaft. The talus supports a coupling portion which is connected to the lower end of the shaft.

Abstract: An endoprosthesis for an elbow joint, includes a humeral component having a shaft portion adapted for engagement in the bone canal of a humerus, an ulnar component having a shaft portion adapted for engagement in the bone canal of a ulnar, and a radius component having a shaft portion adapted for engagement in the bone canal of a radius, with the ulnar component being supported by a swivel bearing in an area of the humeral component. A lateral flange projects outwardly form the ulnar component and is formed with a socket for guiding a sliding member for displacement therein, with the radius component having a head portion which is swingably mounted in the sliding member.