Triple innominate osteotomy in young adults for the treatment of acetabular dysplasia: A 9-year follow-up study

Fifty patients who underwent 60 triple innominate osteotomies were reviewed radiographically and clinically using a modified Harris hip score (HHS). A verage patient age was 26 years (range: 13-48 years). At average 9-year fol low-up (range: 5-14 years), 12 (20%) hips had been converted to total hip a rthroplasty (THA) and 4 (7%) hips had incapacitating pain. Sixteen (27%) hi ps were considered failures. Average modified HHS at final follow-up was 67 (range: 28-91). Forty-nine (98%) of 50 patients reported they would recomm end the procedure to others in the same situation. Radiographically, there was significant improvement in the center-to-edge angle of Wiberg and the a cetabular angle of Sharp. There also was a statistically significant relati onship between failure of the osteotomy and severity of preexisting hip art hrosis as measured by the Tonnis criteria. The results demonstrate triple i nnominate osteotomy was effective in eliminating pain, but the fact that 27 % of hips required or will require THA indicates results may deteriorate wi th time.