Fig. 1From: Biomechanical research of medial femoral circumflex vascularized bone-grafting in the treatment of early-to-mid osteonecrosis of the femoral head: a finite element analysisA–C Surgical steps of the improved MFCVBG; D the special surgical tool of modified MFCVBG; E–F the vascularized bone flap was cut during the operation; G schematic diagram of surgery; H intraoperative fluoroscopy: drilling pressure through large diameter trephineBack to article page