天然牙表面著色物結(jié)構(gòu)與成分分析.pdf

1、福建醫(yī)科大學(xué)碩士學(xué)位論文天然牙表面著色物結(jié)構(gòu)與成分分析姓名：蘇艷君申請學(xué)位級別：碩士專業(yè)：口腔臨床醫(yī)學(xué)指導(dǎo)教師：姚江武20100401Thestructureandcompositionoftheextrinsictoothstain【Abstract】Objective：Tostudytheconstitutionandstructureoftheextrinsictoothdiscoloration(dentalstain)Meth

2、ods：Thescanningelectronmicroscope(SEM)wasusedtosurveythethicknessandstructuralofthestainTheconstitutionofthestainwasstudiedbyEnergyDispersiveSpectrometer(EDS)，F(xiàn)ouriertransformspectroscopy(FTIR)，Xrayphotoelectronspectrosc

3、opy(xPS)andX—rayDiffractionfXRD)observationsResults：Itshowedthatthesestainswerehighlycalcifiedandcontainedasignificantamountoforganicmatter(C，N，0，S)，withtracesofP，F(xiàn)eandCa，andexistintheformtocalciumphosphateThecrystalofth

4、ecalciumphosphateislamellaronthetoothsurface，andthestructureofthecrystalisdifferentfromthehydroxyapatitecrystalsAstheresultofthespectroscopy，inadditiontocontainingtheP043’、C032、OH，thestaincontainsthecharacteristicsabsorp

5、tionpeaksofthebenzeneandaminoacidConclusion：TheresultssuggestthatthedentalstainsprobablyincludehighmolecularweightorganicmaterialstogetherwithsmallamountsofcalciumphosphateThroughanalyzingfunctionalgroupsofthestain，which

6、wasonthenaturaltoothsurface，itshowsthatthestainmaycontainnotonlycalciumphosphate，butalsocontainsomecompositionofpolyphenolandproteinsThecharacteristicabsorptionpeaksofthephenolcomponentinthestainmaterialaresimilartothepe

7、aksoftheteapowdercomposition，butthedifferenceinabsorptionpeakintensitymerelyWemaydeducethatthepolyphenolsandtheproteinsparticipateiIltheformationofthestainOncethestainadsorbedonthetoothsurface，theproteinsadsorbedupimmedi

8、atelyinashorttimeandformattedtheproteinfilms，andthenwerecombinationwiththepolyphenolsinfood，againandagainItmaybethecausesthatthestructureofthestainjUStbelayerby—layeriIlimagesofthescanningelectronmicroscopeThepellicletak