Study on Biotribological Behavior of the Combined Joint of CoCrMo and UHMWPE/BHA Composite in a Hip Joint Simulator-中国Betway体育网页登陆

摘要 UHMWPEcompositesreinforcedwithBovineBoneHydroxyapatite(BHA)indifferentcontentswerepreparedbyheatpressingformationmethod.AhipjointwearsimulatorwasusedtoinvestigatethebiotribologicalbehaviorofUHMWPE/BHAcompositeacetabularcupsagainstCoCrMoalloyfemoralheadsinbovinesynovialubricationat37±1℃.ItwasfoundthattheadditionofBHApowdertoUHMWPEcanimprovethehardnessandcreepmodulusofUHMWPE/BHAcomposites,anddecreasetheirwearratesunderbovinesynovialubrication.WhenthecontentofBHAfillerparticleswasupto30wt%,UHMWPE/BHAcompositesdemonstratedthewelldesignperformancesofthesurfaceandbiotribologicalproperties.Fatigue,ploughingandslightadhesivewearwerethemainwearmechanismsforUHMWPEanditscomposites.Inaddition,thesizesofwearparticlesbecamelargerwithanincreaseinBHApowderaddition.TheseresultssuggestthatBHAfillerisadesirablecomponenttoincreasethewearresistanceofUHMWPE/BHAcompositesforbiomedicalapplications.

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Study on Biotribological Behavior of the Combined Joint of CoCrMo and UHMWPE/BHA Composite in a Hip Joint Simulator

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