Designation:E2670−15StandardTestMethodforObjectiveQuantificationofDentalPlaqueUsingDigitalStillCameras1ThisstandardisissuedunderthefixeddesignationE2670;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONDentalplaqueisabiofilm,whichgrowsonteethandsurroundingtissue.Inmanycases,dentalplaqueistheunderlyingcauseofmanyoraldiseases,thatis,cavitiesandgumdiseases.Thus,controllingdentalplaquethroughitsremovalandinhibitionofre-growthisessentialtomaintaininggoodoralhealth.Today,therearehundredsofproductsproducedtocontroldentalplaque.Examplesare;toothbrushes,toothpastes,floss,rinses,gumsandroutinedentalcleanings.Oneuniversaldesignobjectivemaximizesplaquecontrolthroughenhancedcleaningabilityorchemistrywhichinhibitsplaquegrowth;thatis,anti-bacterialagents.Often,theeffectivenessofaproductorprocedureismeasuredinaclinicaltrialwithtraditionalmethodsofestimatingplaquecoverage.Forexample,themodifiedTureskyindexisoftenused.Thisindexisanintegerscalerangingfrom0(noplaque)to5(completeplaquecoverage).Theclinicalexaminerestimatesthenumericalvalueorscorebasedonvisualobservationoftheplaque.Unfortunately,therearedrawbackstothisapproach.First,thescaleisnon-linearwithrespecttoplaqueareacoverage.Second,theapplicationofthescaleissubjectivebynature.Therefore,anobjectivemethodofmeasuringtheamountofplaqueonteethrepresentsasignificantimprovementinthescienceofplaquemeasurement.1.Scope1.1Thismethodcoverstheprocedure,instrumentalrequirements,standardizationprocedures,materialstandards,measurementprocedures,andparametersnecessarytomakeprecisemeasurementsofdentalplaqueontheteethrevealedbyfluorescence.Inparticularitismeanttomeasuretheamountofplaqueandplaquecoverageonhumanteeth.1.2Digitalimagesareusedtomeasurethecoverageofdentalplaqueontheteethusingdiscriminationanalysis.Alllocalizeddiscolor...
