Zweymuller revision operations

Clinical and radiologic study of the results of revision total hip arthroplasty with Zweymuller prosthe- ses was performed in 67 patients (mean follow up period 52 months). The causes for revision arthroplasty were the following: acetabular loosening (19 patients), femur loosening (1 patient), loosening of both components (47 patients). Surgical technique and choice of the implant depended on the severity of bone destruction (by Engelbrecht and Heinert). Clinical results were evaluated by Merle d’Aubigne score, mean value was 15.3. In 60 out of 67 cases bone formation around the implant components was detected radiologically. In two cases relative recovery was achieved. In 4 patients the signs of initial loosening of the acetabular cup were defined and those patients had marked acetabular bone destruction prior to revision operation. In 1 out of 48 cases bone integration and stem stabilization could not be achieved. The results obtained testified the advantage of cementless implant in revision arthroplasty over the classic cemented technique.