title: Femoral head deformity and severity of acetabular dysplasia of the hip.
abstract: Patients with acetabular dysplasia commonly undergo peri-acetabular osteotomy after skeletal maturity to reduce the risk of the late development of osteoarthritis. Several studies have suggested that deformity of the femoral head influences the long-term outcome. We radiologically examined 224 hips in 112 patients with acetabular dysplasia and early-stage osteoarthritis. There were 103 women and nine men with a mean age of 37.6 years (18 to 49). A total of 201 hips were placed in the acetabular dysplasia group and 23 in a normal group. The centre-edge angle and acetabular head index were significantly smaller (both p < 0.001), and the acetabular angle, acetabular roof angle and roundness index were significantly greater in the acetabular dysplasia group than those in the normal group (all p < 0.001). There were significant correlations between the roundness index and other parameters. Femoral head shape may be influenced by the severity of the acetabular dysplasia.
authors.affiliation: Nagasaki Prefectural Center of Medicine and Welfare for Children, Department of Orthopaedic Surgery, 24-3 Eishohigashi, Isahaya 854-0071, Japan. kokano@pref.nagasaki.lg.jp
authors.forename: K
authors.initials: K
authors.lastname: Okano
authors.forename: K
authors.initials: K
authors.lastname: Yamaguchi
authors.forename: Y
authors.initials: Y
authors.lastname: Ninomiya
authors.forename: S
authors.initials: S
authors.lastname: Matsubayashi
authors.forename: M
authors.initials: M
authors.lastname: Osaki
authors.forename: K
authors.initials: K
authors.lastname: Takahashi
mesh_terms: D000077:Acetabulum / Q000002:abnormalities*; D000293:Adolescent; D000328:Adult; D005260:Female; D005270:Femur Head / Q000002:abnormalities*; D006618:Hip Dislocation, Congenital / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D015207:Osteoarthritis, Hip / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D010027:Osteotomy / Q000379:methods; D011859:Radiography; D012189:Retrospective Studies; D055815:Young Adult
keywords: Acetabular dysplasia; Deformity; Femoral head; Hip; Osteoarthritis; Severity