Factors Affecting Successful Restricted Kinematic Alignment With Robotic Assisted Total Knee Arthroplasty in Patients With Severe Varus Preoperative Alignment

This study highlighted the importance of varus deformity and medial tibial osteophytes when adopting rKA. They were associated with increased failure to achieve rKA. rKA was reliably achieved in minimal varus deformities (HKA ≤ 5°), we recommend an expanded protocol of HKA ≤ 6° varus for mild deformities (HKA 6°-10°), and consider medial soft tissue release for moderate (HKA 11°-15°) and severe deformities (HKA ≥ 16°).