[Intertrochanteric flexion osteotomy in aseptic osteonecrosis of the femoral head in adults. Apropos of 52 cases].
Fifty-two intertrochanteric osteotomies were performed in 42 cases of idiopathic avascular necrosis of the femoral head of which 10 were bilateral. By flexion at the osteotomy site, the operation aims to place the superior pole of the femoral head during weight bearing towards the superior part of the acetabulum. The use of a specially angled nail-plate makes the procedure safe and simple. The results were analysed with an average follow-up of 46 months and a minimum follow-up for 2 years. The overall results were good in 72 p. 100 of cases, with better results for pain and mobility than for stability and gait. The results were better when the necrosis did not reach the centre of the head and when there was true relief from weight-bearing pressure. The indication were the best in grade II necrosis in patients less than 55 years old.