American Hip Institute

2015-Domb et al. Does Robotic-Assisted Computer Navigation Affect Acetabular Cup Positioning in Total Hip Arthroplasty in the Obese Patient? Journal of Arthroplasty

Obese populations present challenges for acetabular cup placement during total hip arthroplasty (THA). This study examines the accuracy of acetabular cup inclination and version in the obese patient with roboticassisted computer navigation. A total of 105 patients underwent robotic-assisted computer navigation THA with a posterior approach. Groups were divided on body mass index (BMI, kg/m2) of b30, 30–35, and N35. There was no statistical difference between the BMI b30 (n = 59), BMI 30–35 (n = 34) and BMI N35 (n = 12) groups for acetabular inclination (P = 0.43) or version (P = 0.95). Robotic-assisted computer navigation provided accurate and reproducible placement of the acetabular cup within safe zones for inclination and version in the obese patient.

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