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Surgical implications of acetabular morphology in cam-type femoroacetabular impingement : a 3D study

Cobb, J.P. and Logishetty, K. and Davda, K. and Murphy, Andrew James and Iranpour, F. (2009) Surgical implications of acetabular morphology in cam-type femoroacetabular impingement : a 3D study. Journal of Bone and Joint Surgery, 93-B (S-III). p. 390.

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Cam femoroacetabular impingement (FAI) is currently treated by resecting the femoral cam lesion. Some surgeons advocate additional anterosuperior acetabular rim resection. However, the exact acetabular contribution to cam-FAI has yet to be described. Using 3D-CT analysis, we set out to quantify the acetabular rim shape and orientation in this condition, and to determine the roles of these factors in cam-FAI. The acetabula of twenty consecutive cam hips (defined by α-angle of Notzli greater than 55° on plain radiographs) undergoing image based navigated surgery. These were compared with twenty normal hips (defined as disease free sockets with a normal femoral head-neck junction) obtained from a CT colonoscopy database.