J Knee Surg 2024; 37(02): 135-141
DOI: 10.1055/s-0042-1760391
Original Article

Accuracy of Advanced Active Robot for Total Knee Arthroplasty: A Cadaveric Study

Han-Jun Lee
1   Department of Orthopedic Surgery, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, South Korea
,
Kwan Kyu Park
2   Department of Orthopedic Surgery, Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea
,
3   Department of Orthopedic Surgery, Chung-Ang University Gwangmyeong Hospital, Chung-Ang University College of Medicine, Gwangmyeong-si, Gyeonggi-do, South Korea
,
Sung Wook Choi
4   Department of Orthopedic Surgery, Jeju National University Hospital, Jeju National University School of Medicine, Jeju, South Korea
,
Bong-Oh Kim
5   R & D center, Curexo Inc., Seoul, South Korea
,
1   Department of Orthopedic Surgery, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, South Korea
› Author Affiliations

Funding This research was funded by CUREXO Inc. and the manufacturer of CUVIS-Joint.
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Abstract

Although the accuracy of other types of robotic systems for total knee arthroplasty (TKA) has been assessed in cadaveric studies, no investigations have been performed to evaluate this newly advanced active robotic system. Therefore, the authors aimed to analyze the accuracy of bone resection in terms of thickness and alignment in a cadaveric study. Three cadaveric specimens (six knees) and an active robotic system (CUVIS Joint, CUREXO) were used in the study. Three surgeons with different experiences in robotic TKAs performed this cadaveric study using the same robotic protocol with two different implant designs. The thickness and angle of bone resection planes obtained from the optical tracking system and the difference between resection planes and the planning data were assessed to determine accuracy. With respect to the overall resection accuracy compared to the plan, the cutting depth accuracy was within 1.0 mm mean of root mean square (RMS), and the resection angle accuracy in terms of sagittal, coronal, and axial planes was within 1.0 degree mean RMS. In contrast, no significant differences were observed between the planned and measured values in terms of the resection angles and cutting thickness. The hip–knee–ankle angle at postoperative evaluation was 0.7 degrees ± 0.7 degrees (RMS 1.0 degrees). This in vivo study suggests that the use of this newly advanced active robotic system for TKA demonstrates a high degree of accuracy in terms of resection thickness and alignment. This finding supports the clinical application of this advanced robotic system.

Level of Evidence Cadaveric study, Level V.

Ethical Approval

The study did not include research with animals or living human participants and was declared exempt by the local institutional review board.




Publication History

Received: 01 June 2022

Accepted: 15 November 2022

Article published online:
13 January 2023

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