[Medium-term results following implantation of cemented Weller type endoprostheses].

102 cement-fixed endoprothesis of Type Weller I, which were followed up for six years on average, showed good results. We saw three aseptic loosenings and one septic loosening (1.5 years after implantation). Circumscribed progressive resorption of the cortical layer is a typical radiological sign of loosening of an endoprothesis. However, radiolucent lines do not prove aseptic loosening. Even stems with a collar may sinter without loosening. No correlation was found between the type of the hip affection (osteoarthritis, aseptic necrosis of the hip, rheumatoid arthritis etc.) and the result of the operation. Regarding our results we consider cement-fixation in total hip replacement as a good procedure in elder patients.