Fig. 2.

A) and B) Schematic diagram of the operation and bone flap fixation with Mg screw (a: the vascularized bone graft (left: origin of bone flapefrom ilia; right: after implantation into the bone defect and removal of necrotic bone); b: the ascending branch of the circumflexa femoris lateralis; c: the excavated region of the femoral head; d: the circumflexa femoris lateralis artery; e: the femoral artery; f: the Mg screw insertion for bone flap fixation). C–F) Bone flap fixation with HP-Mg screw at 1, 3, 6, and 12 months post-surgery [36].