The Bernese periacetabular osteotomy for the treatment of adult hip dysplasia.

The Bernese periacetabular osteotomy was developed for precise spatial reorientation of the adult dyplastic acetabulum and improvement of the femoral head coverage. The osteotomy has a large correction potential (average decrease of acetabular index: 22 degrees) but is technically demanding. With appropriate patient selection, the results obtained are promising. Therefore, the technique described should be considered in the treatment plan for the acetabular dysplasia of the young adult.