Morphometric changes in the acetabulum after Dega osteotomy in patients with cerebral palsy

J Bone Joint Surg Br. 2008 Jan;90(1):88-91. doi: 10.1302/0301-620X.90B1.19674.


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%.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acetabulum / diagnostic imaging*
  • Acetabulum / pathology
  • Adolescent
  • Case-Control Studies
  • Cerebral Palsy / complications
  • Cerebral Palsy / diagnostic imaging*
  • Child
  • Child, Preschool
  • Hip Joint / diagnostic imaging
  • Hip Joint / surgery*
  • Humans
  • Imaging, Three-Dimensional
  • Joint Instability / diagnostic imaging
  • Joint Instability / surgery*
  • Osteotomy / methods*
  • Prospective Studies
  • Quadriplegia / complications
  • Quadriplegia / diagnostic imaging*
  • Tomography, X-Ray Computed / methods