Abstract: Objective To study the short-and long-term effects of SuperPath minimally invasive arthroplasty for the treatment of femoral head necrosis.Methods The subjects were 50 patients with femoral head necrosis.Randomly divided into the control group and observation group with 25 cases in each group.The patients in the control group were treated with total hip replacement through anterolateral small incision.The patients in the observation group were treated with minimally invasive total hip replacement through SuperPath incision.Compared two groups of the perioperative indexes and the incidence of complications，and all patients were followed up for 6 months，compared before and after operation of the Harris hip function score and visual analogue method were evaluated.Results The observation group of the drainage flow[（211.83±23.76）ml]，intraoperative blood loss[（354.06±38.28）ml]，hospitalization time[（8.74±1.53）d]，the difference of leg length[（12.97±3.05）mm] and thigh circumference[（5.41±0.58）mm] was significantly lower than the control group[（150.49±18.61）ml，（213.95±30.24）ml，（4.52±1.06）d，（8.12±2.30）mm and（2.87±0.51）mm，respectively]（P<0.05）.1 year after operation，the Harris score（89.30±4.19）and Barthel index（90.63±4.95） in the observation group were significantly higher than the control group（81.86±5.24，79.47±5.36）（P<0.05）.VAS score was significantly lower in observation group（0.85±0.43） than that in control group（2.09±0.61）（P<0.05）.The incidence of complications in the two groups was not significantly different（P>0.05）.Conclusion SuperPath incision minimally invasive total hip arthroplasty for the treatment of avascular necrosis of the femoral head has advantages such as small trauma，low complication and significant effect.It can relieve pain and promote hip joint function and quality of life recovery.

Key words: SuperPath minimally invasive approach, invasive total hip replacement, femoral head necrosis, operative effect, complications