Objective To explore the inhibitory effect of different solvent extracts of Pu'er tea (raw tea and ripe tea) on enamel demineralization. Methods Phosphorus ion concentration of lactate buffer was tested and phosphorus dissolution rate in free teeth was calculated before and after treatment with different solvent extracts of Pu'er tea (raw tea and ripe tea) and the effect of different solvent extracts of Pu'er tea in inhibiting enamel demineralization was evaluated by setting 20 mg/ml NaF group as the positive control group and deionized water group as the negative control group. Results Compared with the blank group of water, the phosphorus dissolution rates were significantly different in the different solvent extracts of Pu'er tea (raw tea and ripe tea), NaF group and deionized water group (P < 0.05) and there were also significant differences among the different solvent extracts of Pu'er tea (raw tea and ripe tea) (P < 0.05). At the same concentration, the raw tea had stronger effect than the ripe tea with significant difference (P < 0.05). Conclusions Different solvent extracts of Pu'er tea (raw tea and ripe tea) can inhibit enamel demineralization. The higher the concentration of Pu'er tea extracts, the stronger the effect.%目的 探究普洱茶(生茶、熟茶)不同浓度水浸液抑制牙釉质脱矿的作用.方法 检测经普洱茶不同浓度水浸液处理离体牙前后乳酸盐缓冲溶液中磷离子浓度的变化,计算出磷溶出率.设20 mg/L氟化钠组为阳性对照组,去离子水组为阴性对照组,评价普洱茶不同浓度水浸液抑制牙釉质脱矿的作用.结果 普洱茶不同浓度组、氟化钠阳性对照组与去离子水阴性对照组比较差异有统计学意义(P<0.05).普洱茶不同浓度组之间比较差异有统计学意义(P<0.05).同浓度条件下,生茶组比熟茶组的作用强,且差异有统计学意义(P<0.05).结论 普洱茶不同浓度水浸液均具有抑制牙釉质脱矿的作用,且高浓度水浸液作用效果更强.
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