American Hip Institute

2015- Accuracy of Component Positioning in 1980 Total Hip Arthroplasties: A Comparative Analysis by Surgical Technique and Mode of Guidance. Journal of Arthroplasty

The purpose of this multi-surgeon study was to assess and compare the accuracy of acetabular component placement, leg length discrepancy (LLD), and global offset difference (GOD) between six different surgical techniques and modes of guidance in total hip arthroplasty (THA). A total of 1980 THAs met inclusion criteria. Robotic- and navigation-guided techniques were more consistent than other techniques in placing the acetabular cup into Lewinnek's safe zone (Pb0.005 and Pb0.05, respectively). Robotic-guided surgery was more consistent than other techniques in placing the acetabular componentwithin Callanan's safe zone (Pb0.005). No statistically significant differenceswere found between groups in the frequency of patientswith excessive LLD. Clinically significant differences between groups were not found in the frequency of patients with excessive GOD. Level of Evidence: IV

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