Combined pelvic osteotomy in the treatment of both deformed and dysplastic acetabulum three years--prospective study.

Kuwait has a very high incidence of all types of developmental dysplasia of the hip. One of the most complicated forms is the deformed dysplastic acetabulum, which has not only abnormal orientation but it also has lost its shape by the pressure of the subluxed femoral head. The outer part of the socket involves the upper part of the original acetabulum, thus giving it a bipartite appearance. Clear border like edge separates this outer part from the inner part, which represents the lower part of the original acetabulum and it has no direct contact with the femoral head. Combined pelvic osteotomy (CPO) restores both the original shape and treats the malalignment of the acetabulum. Twelve children, aged between 18 and 54 months underwent CPO, two of them bilaterally. The follow up is between 36 - 60 months. In all cases, concentric stable reduction with good acetabular cover was obtained.