Rotational acetabular osteotomy for hip dysplasia: spontaneous medial enlargement of the acetabulum.
We followed 56 patients (63 joints) who had undergone rotational acetabular osteotomy (RAOs) between 1987 and 1993, mean 7 (5-12) years. The Merle d'Aubigné score increased by 15 points or more in 59 and decreased in 4 hips. The arthrosis progressed in 5 joints. In about 2/3 of the cases, we observed some medial and/or lateral expansion of the subchondral bone in the acetabulum 3 years postoperatively, suggesting enlargement of the load-bearing area.
Yasunaga
Y
Y
Department of Orthopaedic Surgery, Hiroshima University School of Medicine, Japan. y-yuji@mcai.med.hiroshima-u.ac.jp
Ikuta
Y
Y
Shigenobu
T
T
Nakamura
S
S
Yamamoto
S
S
Nakashiro
J
J
D000077:Acetabulum / Q000000981:diagnostic imaging*; D000203:Activities of Daily Living; D000293:Adolescent; D000328:Adult; D016723:Bone Remodeling; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D006618:Hip Dislocation, Congenital / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000145:classification / Q000000981:diagnostic imaging / Q000209:etiology*; D010027:Osteotomy / Q000379:methods*; D010146:Pain / Q000209:etiology; D018579:Patient Selection; D011859:Radiography; D012399:Rotation; D012720:Severity of Illness Index; D016896:Treatment Outcome; D016474:Weight-Bearing