中文摘要：

目的：观察没食子对早期釉质龋再矿化作用。方法：60个新鲜拔除的牛前牙,将标本唇面切割为10 mm×10 mm×2 mm的牙釉质小块,随机分为3组,进行脱矿处理,形成人工龋标本后置于再矿化液,分别用氟化钠、没食子、去离子水处理,经过12 d pH循环,药物作用过程前后采用荧光法检测进行定量研究,采用扫描电镜进行定性研究。结果：经过再矿化循环后,各组荧光量均有升高,由高到低依次为氟化钠、没食子、去离子水。统计分析没食子组与氟化钠组比较无明显差异（P〉0.05）,而与去离子水组比较有差异（P〈0.05）。扫描电镜显示氟化物及没食子处理组有颗粒沉积,牙面恢复较为平坦,而去离子水组牙面恢复情况不及前2组。结论：没食子有利于增进早期釉质龋的再矿化作用。

英文摘要：

Objective： To study the effects of the natural medicine Nut gall on the remineralization of dental enamel.Methods： Sixty extracted bovine anterior teeth were used in this study.On the labial surface of each tooth,1 artificial subsurface lesion windows（10 mm×10 mm×2 mm） were created by immersion in demineralizing solution.The specimens with early caries were randomly divided into 3 groups（n=20/group） and treated with fluoride（NaF）,Nut gall and deionized water respectively.Then they were subjected to the pH-cycling regime for 12 days.The average fluorescence loss F（%） were determined with quantitative labeling fluorescence（QLF） and the morphological structure of enamel surface was observed by SEM after treatments.Results： Treatment of the demineralized specimens in the 3 groups increased QLF values respectively（P0.05）.Nut gall and NaF showed similar effects（P0.05）,and stronger than deionized water（P0.05）.Conclusion： Nut gall might be useful to enhance the dental remineralization.