- Design
- Systematic review and meta-analysis of randomised trials and observational cohorts
- Population
- 52 studies of robotic-assisted versus conventional total knee arthroplasty
- Primary outcome
- Component alignment, patient-reported outcomes, operative time, stay, blood loss and complications
- Effect
- Better alignment and fewer outliers with robotic assistance; minimal PROM differences; longer operative time
A meta-analysis of 52 randomised and observational studies compared robotic-assisted with conventional total knee arthroplasty.
Robotic surgery gave more accurate component alignment and fewer outliers. Most patient-reported outcomes showed minimal differences. Operative time was longer, but hospital stay was shorter and blood loss lower. Revision rates and inflammatory markers gave few and inconsistent findings.
The abstract gives no pooled numbers, so effect sizes cannot be quoted here. The authors conclude short-term advantages are modest and that long-term clinical benefit needs better studies with standardised outcomes. Before adopting or defending the platform, weigh the improved alignment against cost, time and the absence of proven long-term survivorship gains, which matters in settings where access to robotics is limited.
- Alignment accuracy is better with robotic assistance; survivorship benefit is not yet shown.
- Operating time is longer, while stay and blood loss were lower.
- Patient-reported outcomes showed minimal differences in most analyses.
- Weigh cost and access against modest short-term gains when counselling patients.
Why it matters
It separates a clear technical advantage from the clinical benefit patients are told to expect.
Don't overread it
Pooled randomised and observational data without long-term follow-up; no revision benefit was established.
The statistics, in plain English
Better alignment is an intermediate measure. Whether it translates into longer implant survival or better function takes years of follow-up, which these mostly short studies could not provide. Mixing randomised and observational studies also raises the risk that surgeon selection influences results.
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