LONG-TERM RESULTS OF DEGA ACETABULOPLASTY

The authors reviewed the results of Dega acetabuloplasty in developmen tal dysplasia of the hip performed simultaneously with intertrochanter ic osteotomy (predominant derotation-varusosteotomy DVO). 74 hips in 5 5 patients were assessed at a follow-up of 7-17 years (mean 10 years). Measurements of the acetabulum and the head-acetabulum-relation were found to be normal or slightly pathologic in 80-93% of the hips. Value s of the femoral head and neck were in the low normal percentage. Poor clinical and radiological outcome was caused by avascular necrosis of the femoral head or revalgisation after DVO. The rate of avascular ne crosis after conservative treatment was 23.4%, the rate as a consequen ce of the operation was 5.4%. Therefore, we prefere at present the sub trochanteric osteotomy of the femur.