CAJ | 학술논문

目的：观察含氟涂料与含氟牙膏对釉质表面再矿化和抗酸作用。方法：取牛恒切牙制备釉质片；统一酸蚀脱矿后随机分为4组（n＝3）；分别为生理盐水（A组对照）、Duraphat含氟涂料（B组）、Fluor Protector含氟涂料（C组）、含氟牙膏规律处理（D组）；处理期间标本置于人工唾液孵育2周；再次酸蚀；各阶段均用显微硬度仪测定釉面显微硬度、扫描电镜观察釉面，图像分析电镜下釉面微孔隙面积差异；统计分析。结果：首次酸蚀后釉面明显脱矿。分组处理2周，A组釉面再矿化不明显；B组和C组釉面形成涂料保护层；D组釉面可见明显再矿化。再次酸蚀后：A组和D组显微硬度下降，B组和C组涂料保护层有明显抗酸作用。再次酸蚀后，A组和D组釉面微孔隙面积增加（P＜0．05），但D组小于A组（P＜0．05）；B组、C组无显著变化（P＞0．05）。结论：含氟涂料在釉面形成保护层，具有抗酸蚀和促进釉面再矿化作用；含氟牙膏能促进脱矿釉面再矿化，抗酸作用较弱。
목적：관찰함불도료여함불아고대유질표면재광화화항산작용。방법：취우항절아제비유질편；통일산식탈광후수궤분위4조（n＝3）；분별위생리염수（A조대조）、Duraphat함불도료（B조）、Fluor Protector함불도료（C조）、함불아고규률처리（D조）；처리기간표본치우인공타액부육2주；재차산식；각계단균용현미경도의측정유면현미경도、소묘전경관찰유면，도상분석전경하유면미공극면적차이；통계분석。결과：수차산식후유면명현탈광。분조처리2주，A조유면재광화불명현；B조화C조유면형성도료보호층；D조유면가견명현재광화。재차산식후：A조화D조현미경도하강，B조화C조도료보호층유명현항산작용。재차산식후，A조화D조유면미공극면적증가（P＜0．05），단D조소우A조（P＜0．05）；B조、C조무현저변화（P＞0．05）。결론：함불도료재유면형성보호층，구유항산식화촉진유면재광화작용；함불아고능촉진탈광유면재광화，항산작용교약。
Objective:To investigate the ability of fluoride toothpaste and fluoride varnish on enamel remineralization and acid resist-ance.Methods:Enamel specimens were prepared from bovine incisors,and were randomly divided into 4 groups(n=3)after acid-etching by 37%phosphoric acid.Specimens in group A(control)was processed daily with normal saline;those in group B and C were treated once with Duraphat varnish and Fluor Protector varnish respectively;in group D was daily processed with fluoride toothpaste. All specimens were incubated in artificial saliva for 2 weeks.Then all specimens received acid-etching again.Micro-hardness test, SEM observation and image analysis were performed before and after each step.Results:After 2 weeks of processing,no remineraliza-tion was found in group A.Varnish layers were observed on the surface of specimens in group B and C.In group D remineralization was detected on the enamel surface.After re-etching,micro-hardness decreased in group A and D.Fluoride varnish layers in group B and C showed strong resistance to acid-etching.After re-etching,area of micro-holes in group A and D increased(P<0.05 ),but that in group D was smaller than in the control(P<0.05).No micro-hole was observed in group B and group C.Conclusion:Protec-tive layer formed on the enamel surface by fluoride varnish is resistant to acid-etching and promotes enamel remineralization.Fluoride toothpaste application can promote enamel remineralization,but with less resistance to acid.