[Stabilization of the proximal femur in hip joint replacement using M.E. Müller's acetabular roof socket].

Extreme changes of the hip joint often require individual technical supplements in addition to the endoprosthesis. But the base of success are procedures using a model of prosthesis and a technique that are matured. This is available e.g. with the old M. E. Müller curved stem hip joint prosthesis. In special cases of extreme changes or damage of the proximal femur we perform in artificial joint-replacement of the hip or changing of prostheses a special kind of operative treatment. This is a combination of the Original-M. E. Müller curved stem endoprosthesis, long or short version of the femoral part, in addition fixated by bone-cement and M. E. Müller's special metal socket--primary indicated for stabilization of the acetabular roof. The indications for this method can be changes of proximal femur and hip-joint, especially dysplasias of pelvis or hip joint, extensive fractures especially in old patients, destructions in polyarthritis, dysplasia of pelvis and coxitis caused by juvenile chronic arthritis and long time therapy with corticosteroids, destructions, loosenings and fractures in changing operations of hip-endoprostheses. Until today we treated 15 different cases by this method--one case was operated 13 years ago--with good results, prooved by Merle d'Aubigné's score.