The John Charnley Award: A Randomized Controlled Trial of Dual Mobility and Single Bearings for Patients at High Risk of Dislocation Following Primary Total Hip Arthroplasty.
J ArthroplastyJun 15, 2026 (epub)
Clinical ResearchOrthopedic Surgery
Ajay S Potluri, Aditya S Yadav, Matthew T Weintraub et al.
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In 30 seconds
This multicenter randomized controlled trial evaluated the effectiveness of dual-mobility (DM) bearings versus single bearings (SB) in reducing dislocations among 555 high-risk patients undergoing primary total hip arthroplasty. The study found a dislocation rate of 0.7% in the DM group compared to 2.1% in the SB group, but this difference was not statistically significant (P = 0.29).
Key findings
- Dislocation rates were 0.7% for DM bearings versus 2.1% for SB bearings (P = 0.29).
- Two-year dislocation-free survivorship was 99.0% for DM and 97.6% for SB (P = 0.63).
- Revision rates were 2.2% for DM and 3.5% for SB (P = 0.45).
- No differences in patient-reported outcomes were observed (P > 0.05).
Why it matters
Understanding the effectiveness of different bearing types in high-risk patients can inform surgical decisions and potentially improve patient outcomes in total hip arthroplasty, particularly regarding dislocation rates.