Triple osteotomy of the innominate bone in treatment of developmental dysplasia of the hip.

Ten children (11 hips) who underwent triple innominate osteotomy between the ages of 11 and 16 years for treatment of symptomatic acetabular dysplasia and who had > 10 years of follow-up since operation were reviewed to determine if satisfactory results reported in an earlier review were maintained. The mean length of follow-up was 12 years (range 10-16 years). All hips were examined roentgenographically, and functional assessment was made with the Iowa hip scoring system. Ten of the 11 hips improved roentgenographically and eight improved functionally after operation. One hip required replacement arthroplasty 16 years after triple innominate osteotomy.