Early national comparison of robotic versus conventional hip replacements for arthritis using National Joint Registry data: target trial emulation study

This national registry study compared robotic-assisted with conventional total hip replacement in about 666,000 UK operations from 2018 to 2024, using propensity score matching to create comparable groups (9,915 robotic vs 39,660 conventional). After matching, revision risk over a mean of 2.5 years did not differ (hazard ratio 0.96, 95% CI 0.75 to 1.22), with five year implant survival of 98.8% in both groups. Revisions for malposition-related causes (dislocation, leg length discrepancy, malalignment) were less common after robotic surgery (HR 0.53, 95% CI 0.30 to 0.93), and mortality did not differ.

AI summary · from the full text · reviewed by Pukhraj Gaheer, Medical Student, Queen's University before publishing

Why it mattersHealth systems are investing heavily in robotic hip replacement, and this early national evidence suggests no overall survivorship advantage so far, which matters for counseling patients and for decisions about where to spend resources.

Presenting this at rounds? Start here

• ?If robotic THR lowers malposition-related revisions but not overall revision, which patients (for example, those at high dislocation risk) might benefit most from robotic assistance?
• ?How should a surgeon counsel a patient who asks for robotic hip replacement, given similar early implant survival but higher costs?