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为了解菌斑液对牙齿矿物饱和度随糖漱口的变化，以及与龋活动性的关系，作者选择２２例年龄相同的大学生，按龋齿情况，将其分为３组。第１组无龋（无龋组），第２组ＤＭＦＳ大于１０但无活动性龋（普通龋组），第３组ＤＭＦＳ大于１０且有活动性龋（活动性龋组），测定各受试者在静止时、用蔗糖液漱口后３ｍｉｎ和７ｍｉｎ时的菌斑液中有机酸、ｐＨ值、钙离子活度（有效离子浓度）和无机成分的含量，并计算对于釉质矿物的饱和度。结果表明，糖漱口之后菌斑液乳酸浓度升高、ｐＨ值降低、总钙和离子钙浓度增加。活动性龋组的菌斑液在糖漱口后ｐＨ值和饱和度降低的幅度明显大于无龋组和普通龋组。结论：牙菌斑液对牙齿矿物的饱和度是指示个体接受致龋食物后牙齿脱矿倾向的敏感指标。
In order to understand the changes of dental mineral saturation with dental mouthwash and the relationship with dental caries activity, the author chose 22 college students of the same age and divided them into 3 groups according to their dental caries. Group 1 caries-free (caries-free group), group 2 DMFS greater than 10 but no active caries (common caries group), group 3 DMFS greater than 10 and active caries (active caries group) At rest, the contents of organic acids, pH, calcium ion activity (effective ion concentration) and inorganic components in the plaque fluid at 3 min and 7 min after mouthwash with sucrose solution were calculated and the degree of saturation for the enamel mineral was calculated. The results showed that the concentration of lactic acid in plaque fluid increased, the pH value decreased, and the total calcium and ionized calcium concentration increased after the mouthwash. In active caries group, the decrease of pH value and saturation of carp plaque fluid after sugar gargle was significantly greater than that of caries-free caries group and common caries group. Conclusions: Saturation of dental plaque fluid to dental minerals is a sensitive indicator of tooth demineralization in individuals receiving cariogenic food.