Fig. 8
From: Bernese periacetabular osteotomy (PAO): from its local inception to its worldwide adoption
Perthes disease in the right hip of a 13-year-old male, operated on with Salter osteotomy. a Persistent subluxation and adduction with extrusion of the healthy lateral pillar and loading of the necrotic area. Adaptive widening of the acetabular cavity. On the right, computer simulation showing relocated head after resection of the necrotic area (red portion) and optimal coverage with PAO. b Intraoperative pictures showing the resection of the necrotic central part of the head with the template in place and the final size of the head after screw fixation of the mobile lateral part of the head with two screws. c Postoperative sequences with the new head healed without necrosis