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  • Title: Can Dual Mobility Cups prevent Dislocation in All Situations After Revision Total Hip Arthroplasty?
    Author: Wegrzyn J, Tebaa E, Jacquel A, Carret JP, Béjui-Hugues J, Pibarot V.
    Journal: J Arthroplasty; 2015 Apr; 30(4):631-40. PubMed ID: 25443363.
    Abstract:
    UNLABELLED: The outcome of a single design of dual mobility cup was prospectively evaluated in a continuous series of 994 revision THAs with respect to dislocation and intra-prosthetic dislocation (IPD). At a 7.3-year mean follow-up, the dislocation rate was 1.5% and the IPD rate was 0.2%. The 2 IPD occurred in acetabular-only revisions and were related to a poor head-to-neck ratio with early impingement and wear at the polyethylene mobile component chamfer. Dual mobility cups demonstrated a low dislocation rate in revision THA but did not compensate for potential perioperative technical errors. In addition, IPD did not appear to be a concern with respect to the benefit in term of instability prevention though caution is advised in acetabular-only revision associated with a poor head-to-neck ratio. LEVEL OF EVIDENCE: Therapeutic study-Level IV.
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