Precision of Acetabular Cup Placement in Robotic Integrated Total Hip Arthroplasty. HIP International. 2015;25(6):531-536.

Precision of Acetabular Cup Placement in Robotic Integrated Total Hip Arthroplasty

Elson L, Dounchis J, Illgen R, et al.
Hip

The aim of this study was to assess the efficacy of stereotactic-arm assisted acetabular component placement during total hip arthroplasty (THA).

120 patients underwent primary THA at 4 different medical centres. A preoperative pelvic CT protocol was used to plan socket placement followed by robotic-arm assisted acetabular preparation and cup insertion. Intraoperative cup position was recorded and postoperative placement measured using Martell suite analysis software.

Using a 95% predictive intervals, robotic-arm cup placement was within +/-4 degrees of planned position in 95% of cases. Applying these data to the so-called safe zone, 96% of sockets were within the defined safe zone. Our data confirms that intraoperative robotic assistance improves the precision of preparation and position of the acetabular cup during total hip arthroplasty.


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