{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,6]],"date-time":"2026-02-06T21:35:09Z","timestamp":1770413709985,"version":"3.49.0"},"reference-count":34,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2012,5,29]],"date-time":"2012-05-29T00:00:00Z","timestamp":1338249600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal Orthopaedic Research"],"published-print":{"date-parts":[[2012,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The purpose of this study was to examine the effects of ceramic femoral head material, size, and implantation periods on the wear of annealed, cross\u2010linked ultra\u2010high molecular weight polyethylene (UHMWPE) (XLPE) in total hip arthroplasty compared to non\u2010cross\u2010linked conventional UHMWPE (CPE). XLPE was fabricated by cross\u2010linking with 60\u2009kGy irradiation and annealing. Femoral heads made from zirconia and alumina ceramics and cobalt\u2013chrome (CoCr) of 22 or 26\u2009mm diameter were used. In this retrospective cohort study, the femoral head penetration into the cup was measured digitally on radiographs of 367 hips with XLPE and 64 hips with CPE. The average follow\u2010up periods were 6.3 and 11.9 years, respectively. Both XLPE creep and wear rates were significantly lower than those of CPE (0.19\u2009mm vs. 0.44\u2009mm, 0.0001\u2009mm\/year vs. 0.09\u2009mm\/year, respectively). Zirconia displayed increased wear rates compared to alumina in CPE; however, there was no difference among head materials in XLPE (0.0008, 0.00007, and \u22120.009\u2009mm\/year for zirconia, alumina, and CoCr, respectively). Neither head size or implantation period impacted XLPE wear. In contrast to CPE, XLPE displayed low wear rates surpassing the effects of varying femoral head material, size, implantation period, and patient demographics. Further follow\u2010up is required to determine the long\u2010term clinical performance of the annealed XLPE. \u00a9 2012 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 30:2031\u20132037, 2012<\/jats:p>","DOI":"10.1002\/jor.22148","type":"journal-article","created":{"date-parts":[[2012,5,29]],"date-time":"2012-05-29T19:09:17Z","timestamp":1338318557000},"page":"2031-2037","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":45,"title":["Wear resistant performance of highly cross\u2010linked and annealed ultra\u2010high molecular weight polyethylene against ceramic heads in total hip 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