五倍子对牙釉质脱矿的影响

目的　了解五倍子提取物及与氟联合应用对釉质脱矿的影响。方法　分别用不同浓度五倍子或与 1mg/ml氟联合处理牙面后进行脱矿 ,紫外 /荧光 /可见光高效分析仪测量脱矿液中钙离子浓度及用激光共聚焦扫描显微镜 ( CL SM)观察釉质脱矿情况。结果　与对照组 (去离子水或氟 )相比 ,除 1mg/ml五倍子组外 ,其余组脱矿液中钙离子浓度均下降 ( P<0 .0 5 )。 CL SM结果显示总荧光量和平均荧光量均下降 ( P<0 .0 5 ) ,荧光面积只有不含氟组和 4m g/ml含氟组降低 ( P<0 .0 1) ,共聚焦图像亦显示实验组荧光带比对照组窄。结论　单独使用五倍子或与 1mg/ml氟联合作用均能抑制牙釉质脱矿

The Effect of Galla Chinensis on the Demineralization of Enamel

Objective To investigate the effect of Galla Chinensis with or without fluoride on demineralization of enamel. Methods Galla Chinensis with or without fluoride and acid buffer were used to treat the samples alternately and the treatment was repeated 8 times. Then the calcium of acid buffer was measured by American PE HTS 7000 plus and the specimens were observed with laser scanning confocal microscope. Results Compared with the calcium concentration of control group (deionized water or fluoride), the calcium concentration of all tested groups (except the 1 mg/ml group without fluoride) decreased significantly (P<0.25). There was marked difference in total fluorescence (TF) and average fluorescence (AF) between the tested groups and control group (P<0.05). As for the area of lesion, only groups without fluoride and the 4 mg/ml group containing fluoride decreased (P<0.01). Confocal images showed that the zone of red area of tested groups was narrower than that of control group. Conclusion Galla Chinensis can reinforce the resistance of enamel to acid, either with or without fluoride.