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Background: Mixed-reality total knee arthroplasty (MR-TKA) allows for simultaneous viewing of the surgical field and overlaid data to potentially match the accuracy of robotic-assisted TKA (RA-TKA) but with minimal footprint and open platform compatibility. This study compared the in vivo accuracy of this novel MR-TKA system to a well-established RA-TKA system. Methods: Data was collected from 40 TKA cases utilizing an FDA-cleared MR-TKA system and 40 modern imageless RA-TKA cases from June 2024 to February 2025. Deviations from intraoperative planned coronal femoral, tibial, and hip-knee-ankle alignment to actual alignment, measured on postoperative radiographs, were compared. Mean variance values between the thickness of planned and caliper-measured resections were also compared. Operative times and postoperative complications were collected. Results: = .002). Conclusions: A novel MR-TKA system provides similar accuracy in both resection depths and component alignment compared to an imageless RA-TKA platform.
Woelfle et al. (Mon,) studied this question.