ArticleArthroplasty (London, England)2025
VELYS robotic-assisted total knee replacement leads to improved mobility, reduction in hospitalisation, surgical duration, and better psychological outcomes: a propensity score matched analysis.
Article in Arthroplasty (London, England), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers, 1 of them a synthesis that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
3 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Early clinical outcomes and preliminary radiological observations of VELYS-assisted versus conventional total knee arthroplasty: a meta-analysis.Journal of robotic surgery · 2026Pooled it
- Use of the VELYS Robotic-Assisted Solution in knee arthroplasty: A scoping review.Journal of experimental orthopaedics · 2026Review
- Indigenous Innovation in Orthopedic Robotics: Making Joint Replacement Affordable in India.Journal of orthopaedic case reports · 2026Article
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundRobotic TKA (rTKA) was developed to improve implant positioning and accuracy of bone cuts, potentially resulting in improved functional outcomes for the patient. The Depuy Synthes VELYS™ Robotic-Assisted Solution (VRAS) is one of the latest, imageless systems available and utilizes the ATTUNE™ primary knee system. Due to its recency, there is limited literature on the outcomes of VRAS compared to its conventional total knee arthroplasty (cTKA) counterpart. This paper aims to look at the differences between VRAS and cTKA regarding early postoperative and 6-month functional outcomes.
methodsRegistry data of all primary TKAs performed by 3 surgeons from January 2021 to December 2024 from a high-volume arthroplasty center were analysed. Patients who underwent VRAS or cTKA using ATTUNE™ implants were included. Propensity scores were estimated using logistic regression, followed by optimal matching in a 1:1 ratio to establish the VRAS and cTKA groups. Early postoperative outcomes (static/dynamic pain score, ambulation distance, length of stay), 6-month functional outcomes (Knee Society Score, Oxford Knee Score, SF-36, patient expectation/satisfaction scores), and proportion attaining a minimum clinically important difference (MCID) were analysed.
resultsSixty-five VRAS patients were matched with 65 in the cTKA group. The VRAS showed significantly shorter surgical duration (78.2 vs. 85.5 min, P = 0.04), improved ambulation distance (22.2 vs. 11.3 m, P < 0.001), and shorter length of stay (2.48 vs. 3.66 days, P = 0.01). Both groups showed significant improvements in the majority of the functional outcome scores at 6 months. The VRAS displayed a trend towards higher SF-36 outcome measures, with significant differences in SF-36 vitality (P = 0.001), SF-36 mental component summary (P = 0.015), and a larger proportion of patients achieving SF-36 bodily pain MCID (76.9 vs 60.0%, P = 0.038). More patients reported satisfaction and expectation fulfillment (95.2% vs 92.3% and 92.1% vs 87.7%, respectively), albeit non-significantly (P = 0.718 and P = 0.413).
conclusionThe VRAS TKA demonstrated superior immediate postoperative advantages and patient-reported functional outcomes at 6 months. Further studies are needed to determine long-term outcomes.
trial registrationCentralized Institutional Review Board (CIRB: 2024-4046).
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