Comparing an imageless hand‐held robotic‐assisted system versus conventional technique for component positioning and early clinical outcomes in total knee arthroplasty

Abstract

BACKGROUND: This study aimed to examine the component positioning and early clinical outcomes in total knee arthroplasty (TKA) using an imageless hand-held robotic-assisted system compared with those without robotics. METHODS: Component positioning, hip-knee-ankle angle (HKA), and clinical outcome 1-year postoperatively were compared between 40 patients who underwent TKA with Navio (robot group) and 40 control patients who underwent TKA with a jig-based technique (manual group). The clinical outcomes evaluated were range of motion and the 2011 Knee Society Score. RESULTS: Implantation errors in the coronal and sagittal alignments were significantly fewer in the robotic group than in the manual group. All knees in the robotic group achieved component positions within 3°. However, the HKA and clinical outcomes did not differ between the groups. CONCLUSION: Although the accuracy of implantation in the robotic group was superior to that in the manual group, the clinical outcomes were similar.