• J Arthroplasty · Apr 2016

    Salvage of Monoblock Metal-on-Metal Acetabular Components Using a Dual-Mobility Bearing.

    • Darren R Plummer, Herman G Botero, Keith R Berend, James W Pritchett, Adolph V Lombardi, and Craig J Della Valle.
    • Department of Orthopaedic Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio.
    • J Arthroplasty. 2016 Apr 1; 31 (4): 846-9.

    BackgroundLarge-diameter, monoblock acetabular components have been used for both hip resurfacing arthroplasty and metal-on-metal (MoM) total hip arthroplasty (THA). If revision is required, one solution is to retain the shell and use a dual-mobility bearing.MethodsWe reviewed the results of 25 revision THAs including 11 hip resurfacing arthroplasty and 14 MoM THAs where a monoblock acetabular component was mated to a dual-mobility bearing.ResultsAt a mean of 29 months, there was one failure, an intraprosthetic dislocation of the dual-mobility bearing. There was a significant decrease in serum metal ion levels postoperatively.ConclusionRetention of a well-fixed, monoblock MoM acetabular shell and mating it to a dual-mobility bearing in the setting of revision surgery seems to be a reasonable, low-morbidity option at short-term follow-up in appropriately positioned cups.Copyright © 2016 Elsevier Inc. All rights reserved.

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