中文摘要：

目的：了解和调查上海市3岁儿童的龋病状况及其相关影响因素。方法：对上海市452名3岁儿童进行龋病状况调查。龋病状况采用由世界卫生组织所推荐的龋失补指数（dmft）来评估。通过问卷调查来收集口腔健康相关的行为、知识和态度等信息。通过多因素方差分析得出与龋病状况相关的影响因素。结果：调查对象的患龋率为39．8％，龋均为1．63（标准差为2．80）。多因素方差分析的结果显示，郊区儿童、经常含奶瓶睡觉的儿童、每天吃甜点2次及以上的儿童和过去1年内有口腔就医行为的儿童具有较高的dmft指数（P〈0．05）。结论：3岁儿童的患龋水平较低，居住地、喂养习惯、饮食习惯和口腔就医行为是影响他们龋病状况的主要因素。

英文摘要：

Objective： To investigate the dental caries status and its associated factors of preschool children aged 3 years in Shanghai. Methods： An oral health survey was conducted in a representative sample of 452 preschool chil- dren aged 3 years. Dental caries status was assessed using dmft index according to WHO recommendations. Infor- mation on oral health behaviors, knowledge and attitude was also collected. Multiple factor ANOVA analysis was performed to investigate the associated factors with dmft score. Results： Prevalence of caries experience among the subjects was 39.8% and the mean draft score was 1.63. Results of Multiple factor ANOVA analysis showed that children who was living in rural, who used nursing bottle before sleeping, who took snack twice or more per day and who had a dental visit within 1 year had significantly higher dmft scores （P〈0.05）. Conclusion： The prevalence of dental caries experience of the children aged 3 years in Shanghai was not high. Their dental caries status was related to their location, feeding habit, snaking and their dental visit behaviors.