Long-term results of valgus-extension femoral osteotomy for advanced osteoarthritis of the hip

We treated 31 hips in 30 patients with advanced osteoarthritis of the hip s econdary to acetabular dysplasia, by valgus-extension femoral osteotomy, Th e mean follow-up was 12.7 years (10 to 17), Acetabuloplasty was added in ten severely dysplastic hips. In 28 hips, radiological widening of the joint space was seen three years a fter operation, but in 12 had narrowed again by ten years, Survivorship ana lysis showed that the rate of survival was 82% using the pain score as the index of failure, and 72% based on radiological findings at ten years. Bett er long-term results were obtained in hips which had an acetabular head ind ex greater than 70% or a roof osteophyte more than 5 mm in length three yea rs after operation. Acetabuloplasty should be added for the hip which is se verely dysplastic and with a poorly developed roof osteophyte.