[The Balgrist acetabulum with uncemented endoprosthesis of dysplastic coxarthrosis and other acetabulum defects]

The Balgrist socket, one of the first cementless and non-threaded press-fit acetabular replacements, ensures primary stable fixation. Tapered design and self-locking fixation of the Balgrist socket achieve initial stability not only in osteoarthritis secondary to congenital subluxation but also in acetabular bone stock damage due to other etiologies. The non-threaded design of the socket permits easier femoral head bone grafting for reconstruction of the acetabular rim.