ASTM F2706-2008 在椎骨切除术模型中枕颈和枕颈-胸椎植入构造的标准试验方法

作者:标准资料网 时间:2024-05-12 23:01:14  浏览:9466   来源:标准资料网

【英文标准名称】:StandardTestMethodsforOccipital-CervicalandOccipital-Cervical-ThoracicSpinalImplantConstructsinaVertebrectomyModel
【原文标准名称】:在椎骨切除术模型中枕颈和枕颈-胸椎植入构造的标准试验方法
【标准号】:ASTMF2706-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:F04.25
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:fatiguetestmethods;occipital-cervicalspinalimplantassembly;occipital-cervicalspinalimplantconstruct;occipital-cervical-thoracicspinalimplantassembly;occipital-cervical-thoracicspinalimplantconstruct;statictestmethods;vertebrectomymo
【摘要】:Occipital-cervicalandoccipital-cervical-thoracicspinalimplantsaregenerallycomposedofseveralcomponentswhich,whenconnectedtogether,formeitheranoccipital-cervicalspinalimplantassemblyoranoccipital-cervical-thoracicspinalimplantassembly.Occipital-cervicalandoccipital-cervical-thoracicspinalimplantassembliesaredesignedtoprovidesomestabilitytothespineduringtheprocessofarthrodesis.Thesetestmethodsoutlinestandardmaterialsandmethodsfortheevaluationofdifferentspinalimplantassembliestofacilitatecomparisonsbetweendifferentdesigns.Thesetestmethodsareusedtoquantifythestaticanddynamicmechanicalcharacteristicsofdifferentdesignsofoccipital-cervicalandoccipital-cervical-thoracicspinalimplantassemblies.Themechanicaltestsareconductedinvitrousingsimplifiedloadschemesanddonotattempttomimicthecomplexloadsoftheoccipital-cervicalandoccipital-cervical-thoracicspine.Theloadsappliedtothespinalimplantassembliesinvivowill,ingeneral,differfromtheloadingconfigurationsusedinthesetestmethods.Theresultsobtainedherecannotbeuseddirectlytopredictinvivoperformance.Theresultscanbeusedtocomparedifferentcomponentdesignsintermsoftherelativemechanicalparameters.Fatiguetestinginasimulatedbodyfluidorsalinemaycausefretting,corrosion,orlubricatetheinterconnectionsandtherebyaffecttherelativeperformanceoftesteddevices.Thistestshouldbeinitiallyperformeddry(ambientroomconditions)forconsistency.Theeffectoftheenvironmentmaybesignificant.Repeatingallorpartofthesetestmethodsinsimulatedbodyfluid,saline(9gNaClper1000mLwater),asalinedrip,water,oralubricantshouldbeconsidered.Themaximumrecommendedfrequencyforthistypeofcyclictestingshouldbe5Hz.Thelocationofthelongitudinalelementsisdeterminedbytheintendedinvivolocationoftheanchors.Theperpendiculardistancetotheloaddirectionbetweentheaxisofahingepinandtheanchor''sattachmentpointstoapolyacetalblockisindependentofanchor-typeforthecervicalblock,butdependentonthedesignfortheoccipitaltestblock.Thedistancebetweenthepolyacetalblockandthecenterofthelongitudinalelementisafunctionofthedesignoftheimplant.1.1Thesetestmethodscoverthematerialsandmethodsforthestaticandfatiguetestingofoccipital-cervicalandoccipital-cervical-thoracicspinalimplantassembliesinavertebrectomymodel.Thetestmaterialsformostcombinationsofoccipital-cervicalandoccipital-cervical-thoracicspinalimplantcomponentscanbespecificdependingontheintendedlocationandintendedmethodofattachment.1.2Thesetestmethodsareintendedtoprovideabasisforthemechanicalcomparisonamongpast,present,andfutureoccipital-cervicalandoccipital-cervical-thoracicspinalimplantassemblies.Theyallowcomparisonofoccipital-cervicalandoccipital-cervical-thoracicspinalimplantconstructswithdifferentmethodsofapplicationtothespine.Thesetestmethodsarenotintendedtodefinelevelsofperformance,sincesufficientknowledgeisnotavailabletopredicttheconsequencesoftheuseofaparticulardevice.1.3Thesetestmethodssetoutguidelinesforloadtypesandmethodsofapplyingloads.Methodsforthreestaticloadtypesandtwofatiguetestsforthecomparativeevaluationofoccipital-cervicalandoccipital-cervical-thoracicspinalimplantassembliesaredefined.1.4Thesetestmethodsestablishguidelinesformeasuringdisplacements,determiningtheyieldload,andevaluatingthestiffnessandstrengthofoccipital-cervicaloroccipital-cervical-thoracicspinalimplantasse......
【中国标准分类号】:C45
【国际标准分类号】:11_040_40
【页数】:14P.;A4
【正文语种】:英语