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Outcomes of Modular Dual Mobility Acetabular Components in Revision Total Hip Arthroplasty
E Grant Sutter1, Taylor R McClellan1, David E Attarian1
1Department of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina.
Background:
There is a high rate of dislocation after revision total hip arthroplasty. This study evaluated the outcomes of 1 modular dual mobility component in revision total hip arthroplasty in patients at high risk of dislocation.
Methods:
We reviewed 64 revisions performed in 27 (42%) patients for recurrent dislocation, 16 (25%) for adverse local tissue reaction, 11 (17%) for reimplantation infection, and 10 (16%) for aseptic loosening, malposition, or fracture. Complications, reoperations, and survivorship were evaluated.
Results:
Three-year survival was 98% with failure defined as aseptic loosening and 91% with failure as cup removal for any reason. With mean follow-up time of 38 months, there were 14 complications, including 2 dislocations treated with closed reduction, 9 infections, and 12 reoperations. All complications occurred in patients revised for instability, adverse local tissue reaction, or infection.
Conclusion:
The early results of this component are promising, with good overall survival and low rate of dislocation.