Fig. 1

Patient's body position and surgical approach. a The patient assumed the lateral recumbent position, the affected side faced upward, flexion of the hip joint and knee joint of the affected limb was nonfixed, and the lower limbs of the healthy side were straightened. b The surgical approach started at the posterior approach of the hip joint 5 cm from the posterior superior iliac spine, extended along the direction of the gluteus maximus muscle fiber to the posterior edge of the greater trochanter, turned to the femoral shaft, and then extended 5 cm downward