CAJ | 학술논문

目的:研究普洱茶水浸液对人工龋齿显微硬度的影响.方法:将牛切牙在pH=4.0的脱矿溶液中脱矿,形成人工釉质龋,选取脱矿后硬度在310 kg/mm2左右的脱矿牛切牙72颗,随机分为12组:20 mg/mL氟化钠(NaF)组(阳性对照组)、去离子水组(阴性对照组)、96、48、24、12、6 mg/mL熟茶组及相同浓度生茶组,用显微硬度仪测试不同溶液处理脱矿釉质表面后的硬度值,观察釉质表面再矿化前后显微硬度的变化值.结果:釉质脱矿标本经96 mg/mL生茶组、48 mg/mL生茶组、24 mg/mL生茶组、96 mg/mL熟茶组、48 mg/mL熟茶组、20 mg/mL氟化钠组处理后,各组釉质硬度均值均较基线值明显升高(P<0.05).再矿化后组间比较,高浓度生茶、熟茶组组与组之间差异无统计学意义(P>0.05).结论:高浓度的生茶、熟茶水浸液对脱矿牛切牙牙釉质均有显著促进再矿化作用且差异无统计学意义(P>0.05),但再矿化作用不如20 mg/mL NaF(P<0.05).
목적:연구보이다수침액대인공우치현미경도적영향.방법:장우절아재pH=4.0적탈광용액중탈광,형성인공유질우,선취탈광후경도재310 kg/mm2좌우적탈광우절아72과,수궤분위12조:20 mg/mL불화납(NaF)조(양성대조조)、거리자수조(음성대조조)、96、48、24、12、6 mg/mL숙다조급상동농도생다조,용현미경도의측시불동용액처리탈광유질표면후적경도치,관찰유질표면재광화전후현미경도적변화치.결과:유질탈광표본경96 mg/mL생다조、48 mg/mL생다조、24 mg/mL생다조、96 mg/mL숙다조、48 mg/mL숙다조、20 mg/mL불화납조처리후,각조유질경도균치균교기선치명현승고(P<0.05).재광화후조간비교,고농도생다、숙다조조여조지간차이무통계학의의(P>0.05).결론:고농도적생다、숙다수침액대탈광우절아아유질균유현저촉진재광화작용차차이무통계학의의(P>0.05),단재광화작용불여20 mg/mL NaF(P<0.05).
Objective: To study the influence of the chemical composition of Pu'er tea on the hardness of the artificial caries. Methods:Put the bovine-cut-enamel into the demineralization solution pH=4 to remineralization to formulation artifical tooth decay. Select 72 demineralization bovine teeth, which hardness is about 310 kg/mm2, and put them into 12 groups in random:20 mg/L NaF group(positive control), deionized water group(negative control), and 96 mg/mL, 48 mg/mL, 24 mg/mL, 12 mg/mL, 6 mg/mL cooked tea group as well as raw tea groups same concentration as above. Use microhardness meter measure the hardness date of the cattle incisive after be handle by different solutions and observe the vary date of the microhardness of the surface enamel before and after remineralization. Results: The enamel demineralization samples were 96 mg/mL raw tea group, 48 mg/mL raw tea group, 24 mg/mL raw tea group, 96 mg/mL cooked tea group, 48 mg/mL cooked tea group, 20 mg/mL NaF group, after treatment, each group enamel hardness mean value was significantly higher than the baseline (P<0.05). After remineralization between groups, a high concentration of raw tea and cooked tea was not statistically significant between group and group (P>0.05). Conclusion:High concentrations of raw tea and cooked tea extract on enamel demineralization of bovine incisors were significantly promote remineralization and no significant difference(P>0.05), but not as good as remineralization 20 mg/mL NaF(P<0.05).