Analysis of wear-related failures in long-term follow-up of crosslinked polyethylene hip sockets

dc.contributor.authorGrobbelaar, C.J.
dc.contributor.authorDu Plessis, T.A.
dc.contributor.authorSteffens, Francois E.
dc.contributor.authorVan der Linde, Michael J. (Mike)
dc.date.accessioned2012-05-25T11:45:43Z
dc.date.available2012-05-25T11:45:43Z
dc.date.issued2011
dc.description.abstractThe publication of our long-term hip replacement follow-up study computer analysis has clearly demonstrated the association between polyethylene (polyethylene/UHMWPE) wear on the one hand and pain, interface widening and osteolysis on the other1. From a total of 97 cases, seven had true failure and needed ultimate revision. These seven cases formed the nucleus of the current study (Group 1). The course of events could then be analysed in great detail, and compared with the other 90 cases (Groups 2, 3, and 4). The purpose of this paper was to confirm the role of polyethylene wear (the independent variable) in the limitation of longevity of the implant; furthermore to identify the cut-off point of wear that is considered acceptable. At the same time quantification of P, I, O (pain, interface widening and osteolysis) was studied (the dependent variables). Once again, computer analysis provided us with detailed values that would constitute the cut-off points for acceptance. These findings then enabled us to categorise the 97 cases into four groups. Of special interest was Group 2: ‘impending failure’. Even though none of the nine cases in Group 2 were revised, this study clearly demonstrated that they should be classified as failures and managed accordingly. In this study some other controversial issues were addressed: the degree of wear proved important as opposed to the tempo, which was not! Equally unimpressive were the patients’ age, activity and body mass, which according to digital analysis had little effect on implant longevity.en_US
dc.description.urihttp://www.charpublications.co.za/C_JournalsORTH.aspen_US
dc.identifier.citationGrobbelaar, CJ, Du Plessis, TA, Steffens, FE & Van der Linde, MJ 2011, 'Analysis of wear-related failures in long-term follow-up of crosslinked polyethylene hip sockets', SA Orthopaedic Journal, vol. 10, no. 1, pp. 58-65.en_US
dc.identifier.issn1681-150X
dc.identifier.urihttp://hdl.handle.net/2263/18902
dc.language.isoenen_US
dc.publisherMedia 24 & South African Orthopaedic Associationen_US
dc.rightsMedia 24 & South African Orthopaedic Associationen_US
dc.subjectWear-related failuresen_US
dc.subjectLong-term follow-upen_US
dc.subjectCrosslinked polyethylene hip socketsen_US
dc.titleAnalysis of wear-related failures in long-term follow-up of crosslinked polyethylene hip socketsen_US
dc.typeArticleen_US

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