ArticleJournal of clinical orthopaedics and trauma2025
Evaluating the accuracy of Cuvis™ robot assisted total knee arthroplasty using offset type tensor system in ligament gap balancing.
Article in Journal of clinical orthopaedics and trauma, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- Feasibility of medial parapatellar approach in unicompartmental knee arthroplasty for moderate to severe varus deformity.Archives of orthopaedic and trauma surgery · 2026Article
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4 authors.
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Abstract
Background: Conventional total knee arthroplasty (TKA) is a widely accepted and cost effective procedure for treating symptomatic knee osteoarthritis. Despite its success, patient satisfaction rates range from 82 % to 89 %, primarily due to suboptimal functional outcomes, reduced implant longevity, and the need for revision surgeries stemming from component malalignment or soft tissue instability. Robot-assisted total knee arthroplasty (RA-TKA) offers a promising approach to address these challenges. Aim: This study aims to evaluate the accuracy of robot-assisted total knee arthroplasty in achieving optimal ligament gap balancing, based on 159 cases performed in 2023. Method: A total of 159 RA-TKA procedures using the Cuvis™ robot were conducted in 2023, with 9 valgus knees and 150 varus knees. Ligament gaps were measured twice by the robotic system: initially before bone cuts and subsequently after bone cuts. During surgery, an off-set type tensor was used to reassess ligament gaps. Cases exhibiting a discrepancy greater than 3 mm between extension and flexion gaps, as measured by both the tensor and robot, were included for further analysis. Discrepancies between surgeon-measured values and robot-predicted values were also evaluated. Result: Of the 159 cases, 35 demonstrated a ligament gap discrepancy of more than 3 mm, as measured by the tensor. Among these, 24 cases (15 %) exhibited discrepancies between robotic measurements and tensor assessments. All 9 valgus knee cases showed discrepancies, while 15 varus knee cases also displayed discrepancies. The robot recorded 20 errors in ligament gap measurement, 2 errors in balancing, and 2 cases with both errors. Conclusion: While robot-assisted TKA excels in bone cutting accuracy, errors in predicting ligament balancing and gaps remain in some cases. Therefore, caution is advised when adapting surgical strategies intra-operatively, relying solely on the Cuvis™ robotic system's measurements.
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