Do dual-mobility bearings lower the risk of my hip arthroplasty popping out of place?
Dislocation, when the ball slips out of the hip socket, is one of the most common reasons a hip replacement needs to be redone 6. Dual-mobility (DM) bearings are a special implant design meant to make that less likely. The short answer: many studies suggest DM bearings do lower dislocation risk, especially in people at higher risk, but the strongest single randomized trial did not find a clear, statistically significant difference 3678.
What the research says
A 2024 multicenter randomized controlled trial followed 555 patients having primary total hip arthroplasty through a posterior approach, all chosen because they were at high risk for instability. Dislocations happened in 0.7% of the dual-mobility group versus 2.1% of the single-bearing group, but that difference was not statistically significant (P = 0.29), and two-year dislocation-free survival was similar between groups (99.0% versus 97.6%) 3. This is the most rigorous type of study, and its results are more cautious than earlier reports.
What to ask your doctor
- Am I considered high risk for hip dislocation (for example, due to age, prior spine fusion, or neuromuscular issues)?
- Would a dual-mobility bearing be a good option for my specific anatomy and surgical approach?
- What does the most recent evidence say about dislocation risk with dual-mobility versus standard bearings in patients like me?
- What are the potential downsides or unknowns of dual-mobility implants, such as wear or the need for future revision?
- How does your own experience and your hospital's data on dislocation rates factor into the choice of implant?
This question is drawn from common patient questions about Orthopedics & Sports Medicine and answered using cited medical research. We do not provide individualized advice.