简介：Abiomimetichipjointsimulatorthatcanbeusedtoevaluatetheoutcomeofthecementedtotalhipreplacementhasbeendesigned,manufacturedandevaluated.Thesimulatorproducesmotionintheextension/flexionplane,withasockettorotateinternal/externally.Atthesametimeadynamicloadingcycleisapplied.Avalidationtestwasperformedonacementedfemoralstemwithinanovelcompositefemur.Thebonequalityhasastrongeffectonthestemmigrationandontheintegrityoftheinterfaces.Themigrationofthestemisacombinationof3-Dtranslationandrotationofthestem.Underthesameloadingconditions,weakboneallowsmorestemmigrationthanstrongbone.Thereisagreatdecreaseinthestrengthofthestem-cementinterfaceafterthedynamictest,andtheweakbonecompositeexhibitedagreaterreductionininterfacialstrengththanthestrongbonecomposite.Thedecreaseoftheinterfacialstrengthindicatesthattheprimarybondingbetweenthestemandthecementmantlehaddeterioratedandtheintegrityofstem-cementinterfacewasdamaged.Thestudydemonstratesthevalueofusingahipjointsimulatortoinvestigatestemmigrationandinterfaceintegritywithinthecementedhipreplacement,suggestingthatmethodcanbeusedforinvitroevaluationofthebiomaterialsusedinthecementedhipreplacements.