• Aamer Malik, Zhinian Wan, Branislav Jaramaz, Gary Bowman, and Lawrence D Dorr.
• The Arthritis Institute at Good Samaritan Hospital, Los Angeles, California 90017, USA.
• J Arthroplasty. 2010 Aug 1; 25 (5): 812-9.

AbstractThere is no agreement on a standard approach to evaluating acetabular cup orientation, ideal target orientation, or a standardized measurement method for cup orientation in total hip arthroplasty. The purpose of this study was to investigate a simple method for validating measurements of acetabular orientation obtained using computer navigation and computed tomography scans. This study validated the imageless navigation system to be accurate with a precision of 1 degrees and a bias of 0.02 degrees for inclination and a precision of 1.3 degrees and a bias of 0 degrees for anteversion measurements. From this study, we propose that acetabular cup alignment is accurately assessed using computer navigation. We suggest acetabular orientation be reported in the radiographic plane (coronal plane), which incorporates pelvic tilt and therefore is more functional definition of cup position.Copyright (c) 2010. Published by Elsevier Inc.

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