{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,31]],"date-time":"2026-01-31T16:11:22Z","timestamp":1769875882933,"version":"3.49.0"},"reference-count":36,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2010,1,8]],"date-time":"2010-01-08T00:00:00Z","timestamp":1262908800000},"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":[[2010,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>In a cohort study, the role of the active tartrate\u2010resistant acid phosphatase (TRACP 5b), a marker of bone\u2010resorbing osteoclasts, for the assessment of loosening after total hip arthroplasty (THA), was analyzed, as well as its correlation with osteolysis and multinucleated cell appearance in the retrievals. Eighty THA patients, who went consecutively to the orthopedic department, were asked to participate, and 54 accepted and were enrolled in the study. Finally, 46 subjects were analyzed, clinical\u2010radiographic evaluation was considered the gold standard, serum TRACP 5b was blindly measured, and a cut\u2010off was obtained, by performing a ROC Curve. Based on the gold standard, patients were split by 19 stable and 27 loosened subjects, and results were matched. TRACP 5b was significantly higher in loosened patients than in stable ones (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001). A good specificity (89.5%), positive predictive value (90.0%), and likelihood ratio (6.33) were calculated, that provided strong evidence of loosening with TRACP 5b levels higher than the cut\u2010off. Moreover, TRACP 5b and osteolysis (Fisher's exact test, <jats:italic>p<\/jats:italic>\u2009=\u20090.03) were found significantly correlated. TRACP 5b has been proven a reliable marker, specifically related to resorbing\u2010multinucleated cells, to ascertain late loosening in THA, and could support standard procedures, if confirmed by performing prospective studies. \u00a9 2010 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 28:887\u2013892, 2010<\/jats:p>","DOI":"10.1002\/jor.21082","type":"journal-article","created":{"date-parts":[[2010,1,8]],"date-time":"2010-01-08T18:07:32Z","timestamp":1262974052000},"page":"887-892","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Potential role of tartrate\u2010resistant acid phosphatase 5b (TRACP 5b) as a surrogate marker of late loosening in patients with total hip arthroplasty: A cohort 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