Is robotic knee replacement better than traditional knee replacement?

In this review of 24 randomized trials, robotic-assisted knee replacement did not produce better function, pain relief, range of motion, satisfaction or shorter hospital stays than conventional surgery.

Does robotic knee replacement take longer?

Yes. Robotic operations took about 22 minutes longer on average, though the authors note this may be influenced by surgeons' learning curve with the technology.

How strong is this evidence?

The study only included randomized controlled trials, but the authors rated the certainty of evidence as low to very low, so the findings should be interpreted with caution until larger, longer trials are done.

Research Summary

Robotic Knee Replacement Gave No Better Pain Relief or Function Than Standard Surgery, Review of 24 Trials Finds

By KneePainNews Editorial Team · October 22, 2026 · Editorial Standards

Not medical advice. This is a plain-English summary for general information. Talk to your doctor or physical therapist before changing your care. Read our medical disclaimer.

Robotic-assisted total knee replacement did not lead to better pain relief or function than conventional knee replacement, according to a new meta-analysis of randomized trials. The robotic operations did take longer on average.

What was studied

Robot-assisted knee replacement is being used more and more because it promises more precise surgery. Researchers in Egypt pooled only randomized controlled trials, the most reliable type of comparison, to see whether patients actually recover better. Their analysis, published in the Journal of Robotic Surgery, included 24 trials with 3,425 patients, and they graded the strength of the evidence using the GRADE system.

Key findings

There were no significant differences between robotic and conventional surgery in improvement on three standard knee function scores (WOMAC, Knee Society Score and Oxford Knee Score).
Pain scores, range of motion, patient satisfaction and length of hospital stay were also similar.
One small advantage on the Oxford Knee Score at 6 months was too small to matter to patients and did not last.
Robotic surgery took about 22 minutes longer on average, though this may partly reflect surgeons still learning the technology.

What it means for people with knee pain

If you are facing a knee replacement, this research suggests you should not assume a robot will give you a better result. A skilled surgeon and good rehab likely matter more than the tool. The authors concluded current evidence does not support routinely choosing robotic surgery over conventional surgery. Ask your surgeon about their own experience and results with whichever approach they recommend.

Limitations

The authors rated the certainty of evidence as low to very low for all outcomes, and the trials differed a lot. Long-term follow-up was limited, and larger multicenter trials are still needed.

Source: Abdelaziz O, et al. Comparative pain relief and functional outcomes following robotic-assisted versus conventional total knee arthroplasty: a GRADE-assessed meta-analysis with meta-regression of randomized controlled trials. Journal of Robotic Surgery, September 2026. doi:10.1007/s11701-026-03934-0. PMID 42789133. Read the original

Frequently asked questions

Is robotic knee replacement better than traditional knee replacement?: In this review of 24 randomized trials, robotic-assisted knee replacement did not produce better function, pain relief, range of motion, satisfaction or shorter hospital stays than conventional surgery.
Does robotic knee replacement take longer?: Yes. Robotic operations took about 22 minutes longer on average, though the authors note this may be influenced by surgeons' learning curve with the technology.
How strong is this evidence?: The study only included randomized controlled trials, but the authors rated the certainty of evidence as low to very low, so the findings should be interpreted with caution until larger, longer trials are done.

Sudden severe pain, swelling, or can't bear weight? Seek medical care promptly. In an emergency call 911.