Objective To assess the dental caries prevalence of children in Yinchuan.
目的分析银川市儿童青少年龋病患病的发展趋势及特点。
Methods The survey of prevalence of dental caries in group aged 12 and 15 years in Anhui province was conducted using the non-proportional, stratified, cluster sampling method.
方法对安徽省四县市的12岁及15岁儿童的龋病发病情况进行抽样调查，采用分层、不等比、多阶段整群抽样的方法。
RESULTS: The indexes of the prevalence rate of dental caries , caries average, GI, OHI-sin the experimental group after teeth brushing education were better than in the control group (P<0.01).
结果：实验组刷牙教育后患龋率、龋均、牙龈指数、简化口腔卫生指数均低于对照组，差异显著（P<0.01）。
The prevalence of nutritional iron deficiency anemia and baby teeth dental caries was downgrade year by year.
肥胖儿发生率逐年上升；营养性缺铁性贫血、乳牙龋齿患病率呈逐年下降趋势。
Conclusions Environmental lead exposure is associated with an increased prevalence of dental caries in the us population.
结论：环境性铅接触与美国居民龋齿发生率增多相关。
Conclusions Environmental lead exposure is associated with an increased prevalence of dental caries in the us population.
结论：环境性铅接触与美国居民龋齿发生率增多相关。
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