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

ABSTRACT

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