Objective:To investigate the prevalence and related factors of dental caries in 3-year-old children in the Development District in Dalian.Methods:A multi-stage,randomized,cluster sampling method was used in the cross-sectional study.All 3-year-old children in the selected 15 kindergartens were invited to take part in the oral health examination conducted by 3 calibrated examiners.The WHO recommended caries diagnosis criteria were used.The structured questionnaire including the information of children's oral hygiene habits,dietary habits,parents' oral health knowledge and socioeconomic status was completed by the parents.Results:1 220 3-year-old children completed the clinical oral examination and 964 children's parents(79.0％) finished the questionnaire.The caries prevalence in 3-year-old children was 62.8％,and the mean dmft and dmfs scores were 3.40 and 7.34,respectively.No differences in the prevalence of caries,mean dmft and dmfs scores were found between boys and girls(P ＞0.05).Logistic regression analysis showed that the frequency of sweets and sugar-containing beverages consumption(P＜0.05),parents'education level(P＜0.05) were significantly related to the caries prevalence.Conclusion:The prevalence and severity of dental caries in 3-year-old children in Dalian Development District were high and the frequency of consumption sugar-containing foods and beverages,parents'education level were related to the decay prevalence.%目的:了解大连开发区3岁儿童乳牙龋病患病状况及影响因素.方法:采用多阶段、整群随机抽样方法,抽取15所幼儿园里全部3岁儿童进行口腔健康检查和儿童家长的问卷调查.参照世界卫生组织推荐龋病诊断标准,问卷内容包括儿童的基本信息、口腔卫生习惯、饮食习惯,家长的口腔健康知识及口腔健康态度以及社会经济因素.使用SPSS 16.0对数据进行统计分析,计算乳牙龋患病率和龋均.采用卡方检验,独立样本t检验和单因素方差分析以及Logistic回归分析比较组间差异及龋病的影响因素.结果:共有1220名3岁儿童完成口腔健康检查,其中964名儿童家长(79.8％)完成问卷调查.3岁儿童乳牙龋病患病率为62.8％,龋均3.40,龋面均7.34,男女间差异均无统计学意义(P＞0.05).Logistic回归分析显示儿童摄入甜食和含糖饮料的频率(P＜0.05),父母的最高学历水平(P＜0.05)与儿童是否患龋相关.结论:大连开发区3岁儿童乳牙龋病患病状况较严重,患龋与进食含糖食物和饮料的频率及家长的教育水平有相关性.
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