Figure 4
From: Stem cell- and growth factor-based regenerative therapies for avascular necrosis of the femoral head
Acellular matrix implantation in a patient with an osteochondral defect of the femoral head and an unstable cartilage defect (ARCO stage III). A trochanteric flip osteotomy [43] was performed to expose the femoral head. (A) Intraoperative view after surgical dislocation, debridement, and anterograde drilling into the sclerotic bone. (B) Aspect of the defect after bone grafting by using cancellous bone from the osteotomy. (C) The cartilaginous portion of the lesion was augmented with an acellular collagen type I hydrogel (CaReS®-OneStep; Arthro Kinetics, Krems, Austria). (D) Schematic illustration of the procedure. ARCO, Association Research Circulation Osseous.