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方法：用变形链球菌Ｉｎｇｂｒｉｔ在Ｗｉｓｔａｒ大鼠上复制出龋齿动物模型，以０．０２１ｍｍｏｌ／Ｌ氟化钠水作为阴性对照，０．０５３ｍｍｏｌ／Ｌ氟化钠水作为阳性对照，给龋模型鼠饲以不同氟浓度（０．０２３ｍｍｏｌ／Ｌ，０．０４２ｍｍｏｌ／Ｌ，０．０５６ｍｍｏｌ／Ｌ）茶水，以Ｋｅｙｅｓ龋齿计分标准和光镜观察作为评价指标，并用扫描电镜，电子能谱观察了茶的抗龋和对釉质龋的再矿化作用。结果：不同浓度的绿茶水均可显著降低龋齿的计分（Ｐ＜０．０１），并对釉质龋有较明显的促进再矿化作用
Methods: The cariogenic animal model was replicated in Wistar rats with Streptococcus mutans Ingbrit, with 0.021 mmol / L sodium fluoride as negative control and 0.053 mmol / L sodium fluoride as positive control, With the different fluoride concentrations (0.023mmol / L, 0.042mmol / L, 0.056mmol / L) of tea, with Keyes dental caries score standards and light microscopy as an evaluation index, and observed by scanning electron microscopy, electron spectroscopy tea Anti-caries and remineralization of enamel caries. Results: Different concentrations of green tea water can significantly reduce the scores of dental caries (P <0.01), and the enamel caries significantly promote remineralization