Er：YAG和Er，Cr：YSGG激光消融牙體硬組織的實(shí)驗(yàn)研究.pdf

1、福建醫(yī)科大學(xué)碩士學(xué)位論文Er：YAG和Er，Cr：YSGG激光消融牙體硬組織的實(shí)驗(yàn)研究姓名：彭奇明申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：口腔臨床醫(yī)學(xué)指導(dǎo)教師：林實(shí)20090501PreliminaryStudyOfEr：YAGandEr，Cr：YSGGAblationEnamelandDentinPostgraduate：QimingPengSupervisors：AssociateProfShiLinAbstractWiththedevelopme

2、ntoflasertechnologylaserhasalreadybeeninvolvedintoalmosteveryfieldsoftheendodontictreatmentWhatconcemsUSmostisthathowtogetthebestsurfaceappearancesofdentalhardtissuesaftertheablationoflasersInthispaper，apreliminaryinvitr

3、ostudyofthelaserablatedcharacteristicsofhumanteethWascarriedoutInthisstudy，Er：YAGlaserandEr，Cr：YSGGlaserwereusedtoablatethedentalhardtissuesWeobservedthecharacteristicchangesoftheablatedtissuesandthenobtainedtheablationt

4、hresholdvaluesofthetwotypesoflaser。TheablationthresholdvalueofEr：YAGlaserindentalenameliS319436J／cm2，indentaldentin，itiS2973。56J／cm2AstoErCr：YSGGlasertheablationthresholdvaluesare412480J／era2inenameland269366J／em2indenti

5、nWehavealsostudiedtheablatedappearencesofhumandentaldentinunderdifferentlaserenergydensitiesofEr：YAGlaserandErCr：YSGGlaserWeobservedthemorphologicalchangesoftheablateddentalhardtissuesandfoundtherelationshipbetweentheene

6、rgydensityandablationcraterdiameterdepthandvolumethattheablationefficiencyisinasignificantlinearcorrelationAtthelastofthisstudy，weevaluatedthescavengingeffectofthetwotypesoflaseronsmearlayerontherootcanalwailscreatedbyha