{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,18]],"date-time":"2026-07-18T09:12:46Z","timestamp":1784365966685,"version":"3.55.0"},"reference-count":24,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2018,2,13]],"date-time":"2018-02-13T00:00:00Z","timestamp":1518480000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100006338","name":"Zimmer","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100006338","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal Orthopaedic Research"],"published-print":{"date-parts":[[2018,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:label\/><jats:p>Polyethylene wear is a known complication in total joint arthroplasty, however, in vivo wear rates in reverse total shoulder arthroplasty (RTSA) remain largely unknown. This study aimed to quantify volumetric and surface deviation changes in retrieved RTSA humeral liners using a novel micro\u2010computed tomography (\u03bcCT)\u2010based technique. After IRB\u2010approval, 32 humeral liners (single manufacturer and model) with term\u2010of\u2010service greater than 90 days were analyzed. Clinical demographics and surgical data were collected via chart review. Unworn liners were used as geometric controls. Retrieved and unworn liners underwent \u03bcCT scanning. Retrieved liner volumes were isolated, co\u2010registered to controls of matching geometry, and surface deviations of the articulation surface and rim were computed. Differences in total volume loss (TVL), volumetric wear rate (VWR), and surface deviation were reported. Semi\u2010quantitative grading evaluated rim damage presence and severity. Mean term\u2010of\u2010service for all liners was 2.07\u2009\u00b1\u20091.33 years (range: 0.30\u20134.73). Mean TVL and VWR were 181.3\u2009\u00b1\u2009208.2\u2009mm<jats:sup>3<\/jats:sup> and 114.5\u2009\u00b1\u2009160.3\u2009mm<jats:sup>3<\/jats:sup>\/year, respectively. Mean articulation and rim surface deviations were 0.084\u2009\u00b1\u20090.065 and 0.177\u2009\u00b1\u20090.159\u2009mm, respectively. Articulation surface deviation was positively correlated to term\u2010of\u2010service. Rim damage was present on 63% of liners and correlated significantly to rim surface deviation. This study reports in vivo wear rates of retrieved RTSA implants. Our results demonstrate volumetric and articulation surface wear in select RTSA liners that is correlated to term\u2010of\u2010service. Calculation of in vivo wear rates can help bridge the gap between clinical outcomes and experimental models such as wear simulations and computational models. \u00a9 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. 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