Combined pelvic osteotomy for deformed dysplastic acetabula: a 5-year prospective study.

Purpose. To assess clinical and radiological results of combined pelvic osteotomy (CPO) for deformed dysplastic acetabula. Methods. Nine girls and 3 boys, aged 28 to 54 months, underwent CPO (combination of innominate osteotomy and Lance acetabuloplasty) to restore both the original shape and the mal-alignment of the acetabulum. They were followed up for at least 5 years. Results. All patients attained concentric stable reduction with good acetabular cover. Conclusion. CPO corrected both deformed and dysplastic acetabula and prevented postoperative subluxation.