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【英文标准名称】:StandardPracticeforX-rayDiffractionDeterminationofPhaseContentofPlasma-SprayedHydroxyapatiteCoatings
【原文标准名称】:浆喷施羟磷灰石涂层的相含量的X射线衍射测定的标准实施规程
【标准号】:ASTMF2024-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:F04.13
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:amorphouscalciumphosphate(ACP);hydroxyapatitecoatings;hydroxyapatite(HAP);hydroxylapatitecoatings;phaseanalysis;tricalciumphosphate;whitlockite;Amorphouscalciumphosphate(ACP);Hydroxyapatite(HAP);Hydroxylapatite(HA);Phaseanalysis;P
【摘要】:Calciumphosphatecoatingshavebeenshowninanimalandclinicalstudiestobebiocompatibleandtoenhancetheearlyattachmentofbonetoimplantsurfaces(seeRefs.1-5)Itisbelievedthattheformofcalciumphosphateceramicanditspuritywithrespecttosecondarycrystallinephasesandamorphousmaterialhaveaneffectonitsphysical,mechanical,andbiologicalproperties.However,nodefinitivestudiesofeffectsonbiologicalpropertieshavebeencompleted.Toachievereproducibleclinicalresultsandtopermitthedeterminationoftheeffectsofpropertiesofthecoatingonbiologicalperformance,itisessentialthatthepropertiesofbothclinicalandexperimentalmaterialsbewell-characterizedandconsistent.Thispracticeprovidesproceduresfordeterminationofthepercentagebyweightofthecrystallinephasesidentifiedashydroxyapatite,x03B2;-TCPandCaOinplasma-sprayedhydroxyapatitecoatings.1.1Thispracticeisforthedetermination,bytheReferenceIntensityRatioExternalStandardMethod,ofthepercentbyweightofthecrystallinephases,hydroxyapatite(HA),beta-(whitlockite)tricalciumphosphate(x03B2;-TCP),andcalciumoxide(CaO)incoatingsdepositeduponmetallicsubstratesbyplasma-sprayinghydroxyapatite.1.2Amajorcomponentinplasma-sprayedHAcoatingsotherthanHAisexpectedtobeamorphouscalciumphosphate(ACP).CrystallinecomponentsotherthanHAthatmaybepresentincludealpha-andbeta-(whitlockite)tricalciumphosphates,tetracalciumphosphate(TTCP),calciumoxide,andcalciumpyrophosphates.QuantificationoftheminorcrystallinecomponentshasproventobeveryunreliableduetoextremeoverlapandconfoundingofX-raydiffractionpeaks.Therefore,thispracticeaddressesthequantificationofonlyHA,x03B2;-TCP,andCaO.1.3Thispracticewasdevelopedforplasma-sprayedHAcoatingswithHAcontentsofatleast50%ofthetotalcoating.Itisrecognizedthattheanalysisofthecrystallinecomponentsusesdiffractionfromregionsofthepatternthatalsoincludesasmallcontributionfromtheamorphouscomponent.However,withinthelimitsofapplicabilityofthispractice,theeffectofsuchinterferenceisbelievedtobenegligible.1.4Thecoatinganalyzedshallbeproducedandprocessedunderequivalentmanufacturingconditionstothatonthedeviceofinterest.1.5ThispracticerequirestheuseofmonochromatedcopperKx03B1;radiationandflatsamples.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:25_220_99
【页数】:4P.;A4
【正文语种】:英语