{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,15]],"date-time":"2026-09-15T03:29:34Z","timestamp":1789442974569,"version":"build-2803163510"},"reference-count":34,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2012,1,1]],"date-time":"2012-01-01T00:00:00Z","timestamp":1325376000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["HIP International"],"published-print":{"date-parts":[[2012,1]]},"abstract":"<jats:p>Hydroxyapatite (HA) coating of implant surfaces is believed to improve longevity of uncemented total hip arthroplasty (THA). However; it is speculated that HA particles may cause third body wear of the polyethylene (PE) liner with subsequent osteolysis and aseptic loosening of implants. We performed a retrospective comparison of two patient populations with cementless Mallory-Head acetabular components. The patients were identified in the Danish hip arthroplasty Registry (DHR); 77 patients had HA-coated cups and 73 patients had non-HA coated cups. Anteroposterior (AP) radiographs were analysed for PE wear, osteolysis was quantified and survival of the acetabular components was compared. The mean follow-up was 11 years.<\/jats:p>\n                  <jats:p>There were no cup revisions in the HA group and 7 cup revisions in the non-HA group (p&lt;0.01). The reason for revision in all cases was aseptic loosening of both stem and cup. The amount of osteolysis was significantly increased around cups in the non-HA group. The two-dimensional linear PE wear-rate of 0.18 mm\/year was higher (p&lt;0.001) in the group with HA coated cups compared with 0.12 mm\/ year in the group with non-HA coated cups. The mean age was lower (P=0.001) in the HA group (57 years) compared with the non-HA group (63 years).<\/jats:p>\n                  <jats:p>After 11.1 years of follow-up non-HA coated cups had a higher revision rate. Increased PE wear with HA-coated cups did not have a negative influence on the revision rate, but may result in a need for revision surgery over time.<\/jats:p>","DOI":"10.5301\/hip.2012.9075","type":"journal-article","created":{"date-parts":[[2012,2,27]],"date-time":"2012-02-27T09:11:06Z","timestamp":1330333866000},"page":"35-40","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":18,"title":["Superior 11-Year Survival but Higher Polyethylene Wear of Hydroxyapatite-Coated Mallory-Head Cups"],"prefix":"10.1177","volume":"22","author":[{"given":"Martin","family":"Gottliebsen","sequence":"first","affiliation":[{"name":"Department of Orthopaedics, Aarhus University Hospital, Aarhus - Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ole","family":"Rahbek","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, Aarhus University Hospital, Aarhus - Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Per F.","family":"Ottosen","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, Esbjerg County Hospital, Esbjerg - Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kjeld","family":"S\u00f8balle","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, Aarhus University Hospital, Aarhus - Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maiken","family":"Stilling","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, Aarhus University Hospital, Aarhus - 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