title: Rotational acetabular osteotomy for severe dysplasia of the hip with a false acetabulum.
abstract: We have divided Severin group-V severely dysplastic hips with a false acetabulum into three subtypes, based on the height and shape of the socket. We performed rotational acetabular osteotomy (RAO) in 19 hips in 17 young adults with a type-1 'low' false acetabulum which had direct contact with the true acetabulum. This is a periacetabular osteotomy which gives acetabular coverage with articular cartilage and produces a nearly normal position of the head. Concomitant osteotomies of the proximal femur were carried out in 11 hips. We reviewed the patients clinically and radiologically at a mean of ten years (6 to 18) after operation. Of the 19 hips, 15 showed very good or good results. This operation is indicated in young adults with a dysplastic hip and a type-1 low false acetabulum. Subclassification of Severin group V is a convenient way of defining those patients who would benefit from the procedure.
authors.affiliation: Department of Orthopaedic Surgery, Saitama Medical School, Irima-gun, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Shindo
authors.forename: H
authors.initials: H
authors.lastname: Igarashi
authors.forename: H
authors.initials: H
authors.lastname: Taneda
authors.forename: H
authors.initials: H
authors.lastname: Azuma
mesh_terms: D000077:Acetabulum / Q000473:pathology / Q000601:surgery*; D000293:Adolescent; D000328:Adult; D005260:Female; D006617:Hip Dislocation / Q000150:complications / Q000473:pathology / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000209:etiology / Q000601:surgery; D010027:Osteotomy / Q000379:methods