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目的:用显微硬度测量法研究正常人体唾液及氟化物对碳酸饮料酸蚀的年轻恒牙牙釉质的再矿化作用。方法:收集口腔正畸门诊减数拔牙所拔除的新鲜、健康年轻恒牙23颗,制成牙釉质样本90块,随机分为对照A组、实验B组及实验C组;每组又分为三个亚组(A1、A2、A3、B1、B2、B3、C1、C2、C3),其中A1、B1、C1浸泡在雪碧中1周、A2、B2、C2浸泡在芬达中1周、A3、B3、C3浸在百事可乐中1周,每组10个牙块。A组牙浸泡完后直接用显微硬度仪做表面硬度测试;B组牙用蒸馏水冲洗干净后分别浸泡于装有正常人体唾液的容器中,将容器置于37℃恒温箱中,定期摇动容器,1月后取出用显微硬度仪做表面硬度测试;C组牙则用蒸馏水冲洗干净后,每日早中晚3次用含氟牙膏涂布牙齿开窗处表面10 min,再分别放入装有正常人体唾液的容器中,将容器置于37℃恒温箱中,定期摇动容器,1月后取出用显微硬度仪做表面硬度测试。结果:正常人体唾液及氟化物均能使脱矿后年轻恒牙牙釉质表面硬度明显升高(P<0.05),且两者之间有统计学差异(P<0.05)。结论:正常人体唾液及氟化物对脱矿年轻恒牙的再矿化作用明显。
OBJECTIVE: To study the remineralization effect of saliva and fluoride on young permanent tooth enamel acid etched by carbonated beverages by microhardness measurement. Methods: Twenty-three fresh and healthy young permanent teeth extracted from oral orthodontic treatment were collected, and 90 enamel samples were made. They were randomly divided into control group A, experimental group B and experimental group C. Each group was divided into Three subgroups (A1, A2, A3, B1, B2, B3, C1, C2, and C3) were obtained in which A1, B1 and C1 were soaked in Sprite for 1 week, A2, A3, B3, C3 dip in Pepsi in 1 week, each group of 10 teeth. A group of teeth soaked directly after the surface hardness test using a microhardness tester; B group of teeth rinse with distilled water were immersed in a container filled with normal human saliva, the container was placed in a 37 ° C incubator, the container was shaken periodically , After 1 month to remove the surface hardness test with a microhardness tester; C group of teeth is rinsed with distilled water, daily morning and evening 3 times with fluoride toothpaste coated teeth on the surface of the window for 10 min, and then into Containing normal human saliva container, the container is placed in a 37 ° C incubator, the container is shaken periodically, after January out with a microhardness tester to do the surface hardness test. Results: The normal human saliva and fluoride can make the surface hardness of young permanent teeth demineralized after demineralization significantly increased (P <0.05), and there was a significant difference between the two (P <0.05). Conclusion: The normal human saliva and fluoride remineralization of young permanent teeth demineralization significantly.