Modified technique of advanced core decompression for treatment of femoral head osteonecrosis

Figure 3 The main steps of the percutaneous expanded decompression and mixed bone graft technique under C-arm fluoroscopy. A: Intraoperative posture of the patient; B: A 12 mm trephine into the lesion area under guidance of the introducer; C: Turning the handle and the blade control knob on it. The reamer can be rotated and the blades expanded; D: The residual necrotic lesions are removed by cleaning with a sharp spoon; E: Autologous bone from the ipsilateral ilium mixing allogeneic bone pieces with bone marrow aspirate; F: a: Before bone grafting; b: Introduce the bone graft funnel into the drilling channel; c: Tamp the mixture with a pestle; d: Bone graft completed.