[Mechanics and type of prosthesis. Biomechanical considerations on the problem of clearance of hip prostheses (author's transl)].

To an increasing extent the total replacement of a hip joint damaged by disease or trauma is increasing in importance. Yet the implantation systems in use at the present time show defects which lead to increased rates of reoperation. In particular, the reactions at the implantation-tissue limiting surface must be specially mentioned. A number of technical parameters are therefore discussed which arise as possible causes for prosthesis clearance.