Study Summary

Sixty patients with medial and lateral knee osteoarthritis were randomized to receive either robotic arm–assisted bi‐unicompartmental knee arthroplasty (bi‐UKA, n=27) or conventional total knee arthroplasty (TKA, n=33). The primary outcome was achievement of a biphasic sagittal knee moment pattern during gait. Secondary outcomes included Oxford Knee Score, New Knee Society Score (NKSS), Forgotten Joint Score, EQ-5D, pain and stiffness VAS, satisfaction, range of motion, and complications. Outcomes were assessed up to 2 years. Overall, the results revealed no significant differences between groups in biphasic gait, patient‐reported outcomes, or complication rates, although NKSS total and clinical subscores favored TKA. The study concludes that robotic bi‐UKA and TKA offer comparable short-term safety and clinical outcomes, but long-term follow-up is required to determine potential advantages of cruciate‐sparing bi‐UKA.