Designation:F1854−15StandardTestMethodforStereologicalEvaluationofPorousCoatingsonMedicalImplants1ThisstandardisissuedunderthefixeddesignationF1854;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversstereologicaltestmethodsforcharacterizingthecoatingthickness,voidcontent,andmeaninterceptlengthofvariousporouscoatingsadheringtononpo-roussubstrates.1.2Amethodtomeasurevoidcontentandinterceptlengthatdistinctlevels(“TissueInterfaceGradients”)throughtheporouscoatingthicknessisoutlinedin9.4.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E3GuideforPreparationofMetallographicSpecimensE883GuideforReflected–LightPhotomicrography3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1field—theimageofaportionoftheworkingsurfaceuponwhichmeasurementsareperformed.3.1.2intercept—thepointonameasurementgridlinepro-jectedonafieldwherethelinecrossesfromsolidtovoidorviceversa.3.1.3measurementgridlines—anevenlyspacedgridofparallellinesallofthesamelength.3.1.4porouscoating—coatingonanimplantdeliberatelyappliedtocontainvoidregionswiththeintentofenhancingthefixationoftheimplant.3.1.5substrate—thesolidmaterialtowhichtheporouscoatingisattached.3.1.6substrateinterface—theregionwheretheporouscoat-ingisattachedtothesubstrate.3.1.7tissueinterface—thesurfaceofthecoatingthatshallhavefirstcontactwithbiologicaltissue(i.e.,thetopofthecoating).3.1.8workingsurface—thegroundandpolishedfaceofthemetallographicmountwheretheim...
