刷牙对酸蚀后釉质表面磨损程度的研究

发布时间：2018-12-14 07:35

【摘要】：目的比较经柠檬酸酸蚀后的釉质块在不同再矿化时间后,刷牙对其表面磨损深度的影响。方法 60个釉质块平均分为A~F共6组,分别安置在10个志愿者的腭基托上。实验第1天,志愿者口腔中佩戴腭基托24 h,其后3 d,每天进行刷牙实验2次。步骤如下:首先,用蜂蜡覆盖F组釉质块,将腭基托置于50 mL柠檬酸溶液中酸蚀2 min,然后取出腭基托,冲洗,并将F组釉质块蜂蜡去除;其他组为酸蚀后经过不同的再矿化时间后刷牙(A组:0 min;B组:20 min;C组:40 min;D组:60 min;E组:酸蚀并且再矿化,但不刷牙;F组:不酸蚀,再矿化,刷牙)。进食及清洁时取出腭基托,其余时间均需佩戴腭基托。通过表面轮廓仪测量釉质块的磨损深度,并用扫描电子显微镜(SEM)观察其表面形貌。结果酸蚀后经过不同时间的再矿化,刷牙对釉质块表面造成的磨损深度不同,各组间的差异具有统计学意义(P0.05)。SEM结果显示,釉质酸蚀后再矿化时间越短,刷牙后表面凹陷越大越深越多,表面形态越粗糙。结论釉质被酸蚀后,在唾液中再矿化时间增加,立即刷牙会对釉质表面形成较大的磨损,60 min后再刷牙可以有效减少刷牙对酸蚀釉质的磨损。
[Abstract]:Objective to compare the effect of tooth brushing on the surface wear depth of enamel after citric acid etching. Methods 60 enamel masses were divided into 6 groups and were placed on palatal base of 10 volunteers. On the first day of the experiment, the volunteers wore palatine base in the mouth for 24 hours and then brushed their teeth twice a day for 3 days. The steps are as follows: firstly, the enamel of group F was covered with beeswax, the palatal base was etched in 50 mL citric acid solution for 2 min, then the palatine base was removed and flushed, and the beeswax of group F was removed. The other groups were brushing teeth after different remineralization time after acid etching (group A: 0 min;B: 20 min;C: 40 min;D: 60 min;E: acid etching and re-mineralization, but not brushing; group F: no acid etching, remineralization, brushing). Remove palatal base when eating and cleaning. Wear palatine base for the rest of the time. The wear depth of enamel was measured by surface profilometer and the surface morphology of enamel was observed by scanning electron microscope (SEM). Results after different time of remineralization after acid etching, the wear depth of enamel mass caused by brushing teeth was different, and the difference between each group was statistically significant (P0.05). SEM results showed that the shorter the time of remineralization after enamel etching, the shorter the time of remineralization after etching of enamel, P < 0.05). After brushing, the larger the surface is, the more deep the surface is, and the rougher the surface is. Conclusion when enamel is etched by acid, the time of remineralization in saliva increases, and the enamel surface will be worn by brushing immediately. After 60 min, brushing after brushing can effectively reduce the abrasion of enamel after brushing.
【作者单位】：郑州市口腔医院儿童口腔科;南昌大学附属口腔医院口腔预防科;
【基金】：江西省教育厅课题(14100)~~
【分类号】：R781.2

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