第一恒磨牙窝沟封闭3年临床效果观察

A 3-year follow-up study on the effect of pit and fissure sealant on preventing caries of the first permanent molars

目的通过3年随访观察窝沟封闭技术预防8岁儿童第一恒磨牙龋的临床效果。方法试验组805人,对照组245人,分别进行口腔检查,对试验组符合适应证的2 190颗第一恒磨牙进行窝沟封闭,分别于1、2、3年后复查试验组封闭剂保留情况和两组第一恒磨牙患龋状况,计算封闭剂保留率和比较两组第一恒磨牙患龋率。结果试验组3年随访封闭剂保留率分别为78.35%、69.56%、69.31%,第一恒磨牙患龋率分别为9.45%、9.91%、10.87%,龋均分别为0.10、0.11、0.12,而对照组3年随访第一恒磨牙患龋率分别为14.29%、17.26%、18.95%,龋均分别为0.15、0.20、0.21。对3年的患龋率分别进行比较,两组间差异均有统计学意义,第2、3年龋均两组间差异有统计学意义。结论窝沟封闭在第一恒磨牙防龋应用中效果好。

Objective To evaluate the effect of pit and fissure sealant on preventing caries of the first permanent molars in children aged at 8 years old. Methods 805 children were examined and 2 190 first permanent molars were treated with pit and fissure sealant（ experimental group）,while 245 children with 947 first permanent molars were served as control group. The retention status of pit and fissure sealant was observed in the experimental group with 3-year follow-up,and the caries rates of the first permanent molars were observed between the two groups. Results Pit and fissure sealant retention rates of experimental group during the 3-year follow-up were78.35%,69.56% and 69. 31%,respectively. The caries rates of the first permanent molars in the experimental group were 9. 45%,9.91% and 10.87% with the mean DMFT of 0.10,0.11 and 0.12 after 1,2 and 3 years,respectively,when those in the control group were 14.29%,17.26%,18.95% with the mean DMFT of 0.15,0.20 and 0.21,respectively. There were significant differences in the caries rates in all three years and in the mean DMFT in the 2ndand 3rdyears between the experimental group and the control group.Conclusion Pit and fissure sealant can play an effective role in the prevention of dental caries of first permanent molars.