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1、AbstractTheexperimentalofthefluidremineralizationinthecoldlightwhiteningandtheeffectonpermanentenamelsurfacestructurePostgraduate:LinaZhangTutor:JinLiuTheFirstAffiliatedHospitalofZhengzhouUniversityZhengzhou450052,ChinaAbstractObjectiveExperimentalontheeffectonenamelmicrostructureafterthef
2、luidremineralizationandBeyondcoldwhiteningtechnologyscombinealapplication,totheinfluenceofthefluidremineralizationonenamelsurface,structure,composition,microhardnessandroughnessofhealthypermanenttooth,providingthenecessarybasicscienceinformationtoguideclinicaltoothwhiteningoperation.Materi
3、alsandMethods1.Preparationofsamples,60premolarscollectedrecentlyfrompatient’swhichneedorthodonticteeatmentwithinformedcontentobtained.Allthecollectedteethwassound,nocariesandcrack,shouldbeobserved.Furtherinclusioncriteriorincludingtoothintegralandtoothcoloruniformityshouldbeachievednodenta
4、lfluorosisandnottetracycline.Thepulledteethwereplacedin0.9%salinewaterat4℃.Beforetheexperimentcalculusandresidualsofttissuewasremovedwithdentalscalers.Rootwasremovedanddiscarded.Thecontrolpartofthetoothwasslicedintofourpartslongitudinallyalongthemiddlebuccolingualandmesiodistalline.Theabov
5、eVI万方数据Abstractsectionedtoothblockswasembededbyusingself-curingresintoescapeonlythetargetedenamelsurface.2.The60premolarswererandomlydividedintothreegroups,respectivelytogroup1,group2,andgroup3,n=20,group1wasobservedbySEMandXRD,microhardnesswasmeasuredtothegroupe2,roughnesswasmeasuredtothe
6、groupe3.Eachteethwaspreparaedto4samples,randomlyselectedoneofthefoursamplestodothebaselinedetection,resultswasnoabnormal.TheremainedthreesamplefromthesametoothwererandomlyassignedtogroupA、BandC.GroupAwasthecontrolgroup;groupBwascoldlightwhiteninggroup,referredtoaswhiteninggroup;groupCwasre
7、mineralizationsolutionandcoldlightwhitening,referedtoasmineralizedgroup.Inthegroupofone,twoandthree,respectivelyreceivingthecorrespondingexperimentalintervention.Aftertheexperimentalintervention,inthetimeofimmediately,oneday,oneweekandtwoweeksdidtheexperimenta
