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目的了解沈阳市9~12岁学生第一恒磨牙患龋状况,对其致龋因素进行分析并评价窝沟封闭项目2年后的防龋效果。方法 2012年在沈阳市铁西区采用随机抽样方法选取3所小学共729名学生,将其中家长同意并签署窝沟封闭知情同意书的299名学生作为试验组进行第一恒磨牙窝沟封闭,其余430名作为对照组。封闭2年后复查两组学生第一恒磨牙患龋率,并结合问卷调查对致龋因素进行分析。结果试验组窝沟封闭剂保留率为81.80%,患龋率为2.01%,明显低于对照组的16.51%,两组患龋率差异有统计学意义(P<0.05)。Logistic回归分析显示,是否进行窝沟封闭、刷牙频率和父母学历可影响学生患龋率。结论窝沟封闭对第一恒磨牙防龋效果显著,应倡导尽早进行第一恒磨牙窝沟封闭,并加强对学生及其家长的口腔卫生保健宣传教育。
Objective To understand the caries status of the first permanent molars of 9 ~ 12-year-old students in Shenyang city and to analyze their carious factors and to evaluate the anticaries effect of the pit-furillosis closed project two years later. Methods A total of 729 students from 3 primary schools were selected by random sampling method in Tiexi District of Shenyang City in 2012. A total of 299 students whose parents agreed to sign the informed consent of pit and fissure seaming were selected as the experimental group to carry out the first molars pit and fissure sealant, The remaining 430 as a control group. Two years after the closure of the two groups of students to review the first permanent molar tooth caries, and combined with questionnaire survey of carious factors were analyzed. Results The retention rate of pit and fissure sealant was 81.80% and the prevalence of caries was 2.01%, which was significantly lower than that of control group (16.51%). There was significant difference between the two groups in caries prevalence (P <0.05). Logistic regression analysis showed that whether pit and fissure occlusion, brushing frequency and parental education could affect the caries prevalence of students. Conclusion The pit and fissure sealant has a significant effect on the prevention of caries of the first permanent molars, and the first permanent molars pit and fissure sealant should be advocated as soon as possible and oral hygiene education should be strengthened for the students and their parents.