Fig. 7
From: Bernese periacetabular osteotomy (PAO): from its local inception to its worldwide adoption
Bilateral severe acetabular dysplasia of 16-year-old female; more pain on the right side. a Several subchondral bone cysts, best visible in a lateral view (black arrow). Displaced rim fracture with some reduction in abduction (white arrow). b PAO combined with femoral varus osteotomy. A 6-month interval between surgery of the hips was observed (right side first). Slight overcorrection of the PAO on the right side for better unloading of the damaged rim area was performed. Partial metal removal after 2 years was performed. Radiological result observed after 5 years. c Closer look to the critical joint area of the right hip before surgery and after sugery (d) showing reduced and healed rim fragment (double arrow)