Efficacy evaluation indicators
femoral head collapse rate
(1) success rate of surgery; (2) radiological evaluation of the location of bone graft at 3 and 6 months after surgery; (3) Harris score of the patient before and 6 months after surgery; (4) femoral head collapse rate at 6 months after surgery; (5) observation of bone ingrowth by CT at 6 months after surgery; (6) observation of changes in microcirculation of the femoral head by DCE-MRI before and 6 months after surgery.