论文部分内容阅读
目的:通过体外实验比较生物活性玻璃和含氟牙膏对脱矿牙本质的再矿化效果。方法 :制备33个离体牙的牙本质盘,随机分为3组,每组11个,分别用生物活性玻璃、1.1 g/L含氟牙膏及去离子水再矿化8 d。然后用激光共聚焦显微镜对牙本质盘进行观察和荧光定量分析,扫描电镜(SEM)观察牙本质小管封闭情况。结果:生物活性玻璃组及含氟牙膏组的荧光面积(A)、总荧光强度(TF)、平均荧光强度(AF)低于空白对照组,生物活性玻璃组低于含氟牙膏组,SEM观察可见含氟牙膏组部分牙本质小管被封闭,管径减小,生物活性玻璃组的牙本质小管基本被封闭,小管口凸起,空白对照组牙本质小管基本开放,周界清晰。结论:生物活性玻璃及1.1 g/L含氟牙膏均可使脱矿牙本质再矿化,生物活性玻璃的再矿化效果优于1.1 g/L含氟牙膏。
OBJECTIVE: To compare the remineralization effect of bioactive glass and fluoride toothpaste on demineralized dentin through in vitro experiments. Methods: 33 dentin disks were prepared and divided into three groups randomly. Each group consisted of eleven rats, and each group was remineralized with bioactive glass, 1.1 g / L fluoride toothpaste and deionized water for 8 d. Then the dentine disk was observed by laser confocal microscopy and the fluorescence quantitative analysis was performed. The occlusion of dentinal tubules was observed by scanning electron microscopy (SEM). Results: The fluorescence area (A), total fluorescence intensity (TF) and average fluorescence intensity (AF) of bioactive glass group and fluoride toothpaste group were lower than that of blank control group, bioactive glass group was lower than that of fluoride toothpaste group, SEM observation Visible part of the toothpaste containing fluoride toothpaste tube is closed, the diameter decreases, bioactive glass group of dentinal tubules were basically closed, small orifice raised, the control group of dentinal tubules basically open, the perimeter clear. Conclusion: Bioactive glass and 1.1 g / L fluoride toothpaste can remineralize dentin. The remineralization of bioactive glass is better than 1.1 g / L fluoride toothpaste.