Please use this identifier to cite or link to this item: http://hdl.handle.net/11434/854
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dc.contributor.authorde Steiger, Richard-
dc.contributor.otherKent, Michael-
dc.contributor.otherEdmondson, Mark-
dc.contributor.otherEbert, Jay-
dc.contributor.otherNivbrant, Nils-
dc.contributor.otherKop, Alan-
dc.contributor.otherWood, David-
dc.date.accessioned2016-11-07T23:27:16Z-
dc.date.available2016-11-07T23:27:16Z-
dc.date.issued2016-03-
dc.identifier.citationJ Arthroplasty. 2016 Mar;31(3):727-34.en_US
dc.identifier.issn0883-5403en_US
dc.identifier.urihttp://hdl.handle.net/11434/854-
dc.description.abstractBACKGROUND: Many exchangeable neck hip systems have been withdrawn because of fretting corrosion at the neck/stem coupling. METHOD: Our prospective randomized study evaluating stem stability (Roentgen stereophotogrammetric analysis, dual-energy x-ray absorptiometry) and clinical outcomes between the K2/Apex hip systems was ceased early because of a withdrawal of the stems which had an unfavorably high early revision rate reported in the Australian Orthopaedic Association National Joint Registry (9.3% at 3 years). RESULTS: At 2 years, there are no clinical differences between the stems. Roentgen stereophotogrammetric analysis has identified a high proportion of potentially concerning subsidence and retroversion in both groups, more marked in the K2 stem, although mostly in asymptomatic patients. Dual-energy x-ray absorptiometry has shown similar bone density around the stems. Retrieval analysis of 3 study patients showed fretting corrosion of the antirotation pin and aseptic lymphocyte-dominated vasculitis-associated lesion, with no relationship to bearing type or size. Analysis of 7 further nonstudy K2/Apex stems confirmed similar corrosion. CONCLUSION: This study shows potentially concerning subsidence of both stems and is the first to describe corrosion at the neck-stem interface and a relationship to metal-related pathology.en_US
dc.publisherElsevieren_US
dc.subjectRevision Hip Arthroplastyen_US
dc.subjectSubsidenceen_US
dc.subjectRSAen_US
dc.subjectALVALen_US
dc.subjectRetrievalen_US
dc.subjectMetal Pathologyen_US
dc.subjectRoentgen Stereophotogrammetricen_US
dc.subjectAnalysisen_US
dc.subjectFretting Corrosionen_US
dc.subjectStem Stabilityen_US
dc.subjectNeck-Stem Interfaceen_US
dc.subjectMusculoskeletal Clinical Institute, Epworth HealthCare, Victoria, Australiaen_US
dc.titleStem migration and fretting corrosion of the antirotation pin in the K2/Apex hip system.en_US
dc.typeJournal Articleen_US
dc.identifier.doi10.1016/j.arth.2015.10.004en_US
dc.identifier.journaltitleThe Journal of Arthroplastyen_US
dc.description.pubmedurihttps://www.ncbi.nlm.nih.gov/pubmed/26723860en_US
dc.description.affiliatesPerth Orthopaedic Institute, Perth, Western Australia, Australia.en_US
dc.description.affiliatesCITRA (Centre for Implant Technology and Retrival Analysis) Medical Engineering and Physics, Perth, Western Australia, Australia.en_US
dc.description.affiliatesAOA National Joint Registry, Data Management & Analysis Centre, School of Population Health, University of Adelaide, Adelaide, South Australia, Australia.en_US
dc.type.studyortrialProspective Studyen_US
dc.type.contenttypeTexten_US
Appears in Collections:Musculoskeletal

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