Endoprosthesis

摘要

An endoprosthesis is equipped with a collar and a prosthesis shaft and is adapted to be anchored longitudinally in a bone without the use of cement. A hip endoprosthesis can be constructed for anchorage in the proximal femur, in which the prosthesis shaft is composed of a plurality of parallel interconnected thin plates which are configured as plate-shaped partial faces and which have peripheral cutting edges which face away from the prosthesis collar. A tibial plateau prosthesis can be similary constructed, and includes a tibial plateau and a supporting structure formed of thin plates which extend in a common direction and which are interconnected. Both types of prosthesis can be driven into the bone without destruction of existing bone tissue and without removal of spongiosa. A shaft structure is employed which ensures the firmest possible anchorage in the medullary space, with a porous surface being provided to facilitate the in-growth of spongy material to thereby increase the strength of the anchorage of the prosthesis shaft.