Chiari osteotomy in association with intertrochanteric osteotomy in adults.

The authors report the results obtained in 34 adult patients suffering from early degenerative arthritis of the hip following mixed dysplasia in which the reduction in the central-edge angle and the increase in the acetabular index is associated with modification of the neck-shaft angle and/or femoral anteversion. These patients underwent a combined Chiari iliac osteotomy (C.I.O.) and intertrochanteric osteotomy (In.O.). The results indicate that, when the indications and technique are respected, C.I.O. associated with In.O. is a reliable surgical method.