Acetabular Component Migration Measured Using Radiostereometric Analysis Following Revision Total Hip Arthroplasty

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Abstract
» Radiostereometric analysis (RSA) studies of acetabular component migration following revision total hip arthroplasty (THA) have a large variation in their methodology and reporting of results, and, therefore, they may not be directly comparable. Standardization of RSA reporting is recommended. » In our review of RSA studies, there was a trend for cemented acetabular components to have larger amounts of early proximal migration than uncemented acetabular components. Results regarding cemented and uncemented components should be reported separately. » Cohorts that addressed larger acetabular defects were associated with a larger amount of early migration. » Reporting the migration result at 1 and 2 years postoperatively may enable earlier identification of poorly performing implants.

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