[Personal experiences with uncemented prostheses]

Experience with different types of non-cemented total hip endoprostheses is critically discussed. Three radiological criteria of a good result indicated: the presence of radiolucent lines, cancellous transformation, and a particular appearance and thickness of the cortex. The radiological changes and clinical results make it possible to draw a 'survival curve' for each type of implant. This series shows that unsatisfactory results have been due mostly to primary diaphyseal, distal fixation of the prosthetic stem. The CLS prosthesis, with mainly metaphyseal primary anchorage, is presented. Discussion of the radiologically and histologically established response of bone.