Cementation of a Dual Mobility Construct in Recurrently Dislocating and High Risk Patients Undergoing Revision Total Arthroplasty

Brian P. Chalmers, Cameron K. Ledford, Michael J. Taunton, Rafael J. Sierra, David G. Lewallen, Robert T. Trousdale

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Background: Recurrent instability remains a challenge after revision total hip arthroplasty (THA). We report the outcomes of cementing a cementless dual mobility (DM) component into a stable acetabular shell for the treatment and/or prevention of instability in revision THA. Methods: Eighteen patients (18 THAs) undergoing revision THA with a specific monoblock DM construct cemented into a new acetabular component or an existing well-fixed component from 2011 to 2014 were retrospectively reviewed. Tumor prostheses and total femoral replacements were excluded. In 9 patients (50%), components were implanted specifically for recurrent dislocations. Mean age was 64 years; mean follow-up was 3 years. Patients underwent an average of 4 prior hip operations (range 2-6). Results: No cemented DM cups dissociated at the cement-cup interface. Three patients (17%) experienced a postoperative dislocation. One required a revision to constrained liner and 2 underwent open reduction with retention of the DM construct. Harris Hip Scores improved from 53 to 82 postoperatively (P <.001). Conclusion: Cementation of a monoblock cup DM construct, an off-label use as the construct is not specifically made for cementation, into a well-fixed acetabular component provides an alternative to enhance prosthetic stability in (1) recurrently dislocating THAs with well fixed, well-positioned acetabular components and (2) complex acetabular reconstructions in which constraint should be avoided. While not a perfect solution in this series, DM constructs provide a number of advantages including no added constraint at the interface and a large effective femoral head to diminish prosthetic impingement.

Original languageEnglish (US)
Pages (from-to)1501-1506
Number of pages6
JournalJournal of Arthroplasty
Issue number5
StatePublished - May 2018


  • cemented liner
  • constrained liner
  • dislocation
  • dual mobility
  • instability
  • revision total hip arthroplasty

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine


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