Better precision of a new robotically assisted system for total knee arthroplasty compared to conventional techniques: A sawbone model study.

Abstract

The purpose of this study was to compare the accuracy of this new HURWA robotic-assisted total knee arthroplasty (TKA) technique to the accuracy of the conventional technique in a sawbone model. The HURWA robotic-assisted TKA system was applied in the robotic group. After bone resection, all of these sawbones were scanned by the use of a structured light scanning system. Measurements of bone resections, femoral coronal and sagittal measurements, and tibial coronal and sagittal measurements were recorded. Compared to the conventional technique, the HURWA robotic-assisted system significantly improved the accuracy of the bone resection levels and angles. In the robotic group, the accuracy of all of the bone resection levels was below 0.6mm (with standard deviation [SD] below 0.6mm), and all of the bone resection angles were below 0.6° (with SD below 0.4°). Our data suggest that this novel HURWA robotic-assisted system can significantly improve the accuracy of bone resection levels and angles.