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目的评价窝沟封闭对儿童乳磨牙的防龋效果。方法选取无龋病的3岁幼儿60名,共480颗乳磨牙,采用自身半口对照的方法,以右侧240颗乳磨牙作为实验组,进行窝沟封闭,左侧240颗乳磨牙作为对照组,未进行窝沟封闭;分别于窝沟封闭后1年、2年观察实验组封闭剂保留情况及两组患龋情况。结果 240颗乳磨牙均能完成窝沟封闭;窝沟封闭1年后,封闭剂完全保留为212颗(88.33%),2年后为187颗(77.92%)。窝沟封闭1年后,实验组乳磨牙患龋5颗(2.08%),少于对照组的29颗(12.08%)(P<0.001);窝沟封闭2年后,实验组乳磨牙患龋12颗(5.00%),少于对照组的57颗(23.75%)(P<0.001)。结论窝沟封闭是预防乳磨牙患龋的有效方法。
Objective To evaluate the anticaries effect of pit and fissure sealant on children’s molars. Methods Sixty three-year-old children without caries were enrolled in this study. A total of 480 primary molars were selected. 240 male molars on the right were used as the experimental group. The fissure sealant was closed and 240 molars on the left were used as controls Group, no fissure sealant occlusion; fissure sealant were closed 1 year and 2 years after the study group sealant retention and two groups of caries. Results One hundred and seventy two molars could complete the pit and fissure sealant. One year after the pit and fissure was sealant, 212 sealers (88.33%) remained intact and 187 (77.92%) after two years. One year after the pit and fissure was closed, there were 5 (2.08%) caries in the test group and 29 (12.08%) in the control group (P <0.001). Two years after the pit and fissure was closed, the experimental group had deciduous caries 12 (5.00%), less than 57 control (23.75%) (P <0.001). Conclusion Pit and fissure sealant is an effective method to prevent caries in deciduous molars.