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Journal of Bone and Joint Surgery - British Volume, Vol 90-B, Issue 1,
88-91.
doi: 10.1302/0301-620X.90B1.19674 Copyright © 2008 by British Editorial Society of Bone and Joint Surgery Morphometric changes in the acetabulum after Dega osteotomy in patients with cerebral palsyC. Y. Chung, MD, PhD, Orthopaedic Surgeon, Professor1; I. H. Choi, MD, PhD, Orthopaedic Surgeon, Professor2; T-J Cho, MD, PhD, Orthopaedic Surgeon, Associate Professor2; W. J. Yoo, MD, PhD, Orthopaedic Surgeon, Assistant Professor2; S. H. Lee, MD, Orthopaedic Surgeon, Instructor1; and M. S. Park, MD, Orthopaedic Surgeon, Assistant Professor1
1 Department of Orthopaedic Surgery, Seoul National University, Bundang Hospital, 300 Gumi-Dong, Bundang-Gu, Sungnam, Kyungki 463-707, Korea. Correspondence should be sent to Professor M. S. Park; e-mail: pmsmed{at}hanafos.com
We carried out a morphometric analysis of the acetabulum following Dega osteotomy in patients with cerebral palsy using three-dimensional CT. We assessed 17 acetabula in 12 patients with instability of the hip. A Dega osteotomy and varus derotation femoral osteotomy were performed in all 17 hips. Three-dimensional CT scans were taken before and approximately one year after operation. Acetabular cover was evaluated using anterosuperior, superolateral and posterosuperior acetabular indices, and the change in the acetabular volume was calculated. Inter- and intra-observer reliability was assessed using the intraclass correlation coefficient. After the osteotomy, the anterosuperior, superolateral and posterosuperior cover had improved significantly towards the value seen in a control group. The mean acetabular volume increased by 68%.
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