Fig. 3

A 33-year-old male patient underwent free graft of vascularized iliac bone flap based on deep circumflex iliac vessels for treatment of idiopathic ONFH of the right side. a Preoperative X-ray and b preoperative CT scans showed heterogeneous density of the femoral head. c The iliac bone flap was separated and implanted into the bone groove. Postoperative X-rays at d 3 months, e 10 months, and f postoperative CT scans at 10 months showed no collapse of femoral heads or narrowing of the hip joint spaces