摘要:
了解广州市中小学生乳牙龋牙数及龋补与恒牙龋的关联性,为预防学生恒牙龋病提供参考.方法 2014年9-12月,对广州市7,9,12和14岁的5 272名中小学生进行口腔检查,记录乳、恒牙患龋及龋补情况,运用负二项回归模型分析乳牙龋牙数和龋补数对恒龋牙数的影响.结果 广州市7,9和12岁学生乳牙患龋率分别为48.24%,45.21%,6.10%.7,9,12和14岁学生恒牙患龋率分别为0.61%,2.85%,10.14%,14.28%.男、女生乳牙患龋率分别为35.04%和34.08%,恒牙龋患率分别为4.88%和8.82%.以恒龋数为结局变量,分析乳龋对恒龋的影响,调整学生年龄、性别和城乡后,负二项回归模型中离散参数的估计值为16.37 (95%CI=9.27~28.90),女生较男生更易患恒牙龋,越年长的学生患恒牙龋的强度越高,且均有统计学意义(x2值分别为41.09,13.32,19.40,P值均<0.01).乳牙龋拟合负二项回归模型显示,调整年龄、性别和城乡后,有乳牙龋补和恒牙龋补的学生与恒牙龋的关联均有统计学意义(β值分别为1.00,2.76,P值均<0.05).将乳牙龋补和恒牙龋补同时纳入模型后,乳牙龋补对恒牙龋有保护效应(β=-1.09,95% CI=-1.72~-0.46,P<0.01),而恒牙龋补和恒牙龋的正关联也仍有统计学意义(β=3.02,95%CI=2.65~3.39,P<0.01).结论 乳牙龋越严重的中小学生恒牙龋也越严重,对乳牙龋进行龋补修复有助于降低恒牙龋牙数.
Abstract:
Objective To evaluate the relationship among the number of primary caries and filled caries and dental caries,and toprovide the reference and basis for the prevention of dental caries.Methods A total of 5 272 students aged 7,9,12 and 14 in primary and middle schools of Guangzhou were offered with oral examination to record the situation of primary and permanent teeth and caries filling.And the negative binomial regression to analyze the impact of primary caries and filled caries on dental caries.Results The caries rates of deciduous teeth among students aged 7,9,12 in Guangzhou were 48.24%,45.21%,6.10%,respectively,and those of permanent teeth among students aged 7,9,12,14 were 0.61%,2.85%,10.14% and 14.28%,respectively.The caries rates of boys and girls were 35.04% and 34.08%,respectively,and the prevalence rates of permanent teeth were 4.88% and 8.82%,respectively.With a constant number of caries outcome variables,the research analyzed the impact of caries of constant caries,and after adjusting their age,gender and urban and rural areas,the estimated value in the negative two discrete parameter K regression modelwas 16.37(95%CI=9.27-28.90),the girls were usually more susceptible to constant caries.The older the students were,the higher intensity of their constant caries,and there were statistically significant (x2 =41.09,13.32,19,40,P <0.01);Two teeth fitting negative regression model showed that after adjustment for age,gender and urban and rural areas,association between students of caries filling of decidous and permanent teeth and permanent teeth caries were statistically significant(β =1.00,2.76,P<0.05).The dental caries of deciduous teeth caries filling had a protective effect on permanent teeth caries after incoporating deciduous and permanent teeth caries repair and compensation into the model (β =-1.09,95% CI=-1.72--0.46,P<0.01).And the association between permanent teeth caries filling and deciduous teeth caries was of statistical significance(β=2.99,3.02,95%CI=2.65-3.39,P<0.01).Conclusion The more serious denatl caries students in primary and middle schools suffer from,the more serious caries they have.Filling the deciduous teeth caries can reduce caries effectively.
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