Calculating the hip center of rotation using contralateral pelvic anatomy

• DOI: 10.1002/jor.23118
• Publication Date: 2015-12-02T13:34:51Z
• Authors: Matthieu Durand‐Hill; Johann Henckel; Keshthra Satchith...; Shiraz Sabah; Jia Hua; Harry Hothi; Ronald J. Langstaff; John Skinner; Alister Hart
• Keywords: Mirroring

Failure to place an artificial hip in the optimal center of rotation results poor function and costly complications. The aim this study was develop robust methodology estimate (hCoR) from preoperative computed tomography (CT) scans, using contralateral anatomy, patients with unilateral diseased hips. Ten (five male, five female) normal pelvic one patient a dysplastic acetabulum were recruited London Implant Retrieval image bank. 3D models each pelvis generated commercial software. Two methods for estimation hCoR compared. Method 1 used mirroring technique alone. 2 utilized automatic alignment. Predicted versus actual co-ordinates compared intraclass correlation coefficients paired T-tests. Both predicted excellent agreement original (>0.9) all axes. techniques allowed prediction within ± 5 mm provided useful clinical information planning acetabular reconstruction defects. less complex is suitable developmental degenerative pathologies. may provide greater accuracy discrete group development prior pathology (e.g., fractures). © 2015 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 34:1077-1083, 2016.