Surgery · 9 h ago
Registry study finds no significant revision risk difference for robotic knee replacements
A BMJ target trial emulation study examined 697,145 knee replacement surgeries using National Joint Registry data. Robotic and conventional procedures showed no statistically significant differences in revision or intraoperative complication risks, although mean follow-up was 2.5 years and residual confounding remains possible.
- Registry analysis included 697,145 knee replacement surgeries.
- Revision risks did not differ significantly between robotic and conventional procedures.
- No significant differences emerged in intraoperative complication risks.
- Mean follow-up was 2.5 years; residual confounding remains possible.
A UK observational study published in The BMJ evaluated early comparative effectiveness of robotic versus conventional total knee replacement (TKR) and unicompartmental knee replacement (UKR) for arthritis. National Joint Registry data included 697,145 surgeries performed in public and private hospitals between 2018 and 2024: 675,034 conventional and 22,111 robotic procedures. Researchers used propensity score matching within a target trial emulation framework to compare implant survival, revision risks and intraoperative complications.
Five-year implant survival in matched conventional and robotic TKR groups was 98.5% and 98.6%, respectively. Revision risk did not differ significantly (hazard ratio 1.03, 95% confidence interval 0.86–1.26). For UKR, corresponding survival estimates were 97.8% and 96.4%, with no significant revision risk difference (hazard ratio 1.03, 95% confidence interval 0.75–1.42). Cause-specific revision and intraoperative complication risks also did not differ significantly for either procedure.
These findings do not establish equivalence or a revision-risk advantage for robotic surgery. Mean follow-up was 2.5 years despite reporting five-year survival estimates, and the observational design leaves potential unmeasured and residual confounding. The authors highlight the need for careful evaluation of robotic technology in publicly funded healthcare systems given its substantially higher capital and procedural costs.
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The BMJ: Early national comparison of robotic versus conventional knee replacements for arthritis using National Joint Registry data: target trial emulation study ↗This is an automated AI-condensed summary that has not yet been reviewed by an editor. Always consult the full item at the original source.