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目的:通过扫描电子显微镜(SEM)观察三种儿童牙膏对乳牙牙本质小管的的封闭情况,进一步了解三种儿童牙膏的抗敏情况。方法:选取20颗健康的牙冠完整的第二乳磨牙,随机分成4组,即一组为空白对照组,其余三组分别用不同牙膏(奥乐V儿童牙膏,奥敏清牙齿脱敏剂,涑爽儿童护齿牙膏)处理,每组随机选5颗牙齿,将其分别用硬组织切割机制备成1 mm厚,3 mm×3 mm大小的牙本质片,再采用37%的磷酸处理15秒之后,制备敏感牙本质模盘。用牙膏悬浊液进行刷牙实验一周,最后进行标本检测。结果:三组牙膏组的牙本质小管在单位面积的封闭牙本质小管的数目和单位长度的渗透深度均表现出统计学差异(P<0.05)。结论:三种实验的儿童牙膏均具有封闭乳牙牙本质小管的作用。但在三种牙膏的对比试验中,奥敏清牙齿脱敏剂封闭牙本质小管的效果最好,其次是涑爽儿童护齿牙膏,再次是奥乐V儿童护齿剂。
OBJECTIVE: To observe the occlusion of dentinal tubules of deciduous teeth by three kinds of children’s toothpaste by scanning electron microscope (SEM), and learn more about the anti-allergy of three kinds of children’s toothpaste. Methods: Twenty healthy crowns with a complete second molars were randomly divided into four groups, namely a group of blank control group, the other three groups were treated with different toothpaste (Aole V children toothpaste, Aminqing tooth desensitizer,涑 Shuang children toothpaste toothpaste) treatment, each group randomly selected five teeth, respectively, with a hard tissue cutting machine prepared into 1 mm thick, 3 mm × 3 mm size dentin tablets, and then treated with 37% phosphoric acid 15 Second, prepare a sensitive dentin disk. Toothpaste suspension with toothbrush test week, the final specimen testing. Results: The number of dentinal tubules per unit area and the penetration depth per unit length of dentin tubules in three groups showed statistical difference (P <0.05). Conclusion: Three kinds of experimental children’s toothpaste have the effect of closing the dentinal tubules of deciduous teeth. However, in the three kinds of toothpaste comparison test, Aminqing tooth desensitizer closed the dentinal tubules best, followed by Shuang Shuang children tooth care toothpaste, once again Austrian music V children care agent.