【摘要】 目的了解沈阳市儿童乳牙龋病极性化分布情况。方法2000年随机选取沈阳市10所幼儿园的3799名2～5岁乳牙列儿童进行龋病情况调查。计算各年龄组龋失补牙数(dmft)和SiC指数,并将各年龄组人群按dmft的大小分亚组,统计各亚组人数及平均dmft,以及亚组dmft占总dmft的百分率。结果儿童龋病分布不均衡,存在两极化现象。其中2岁组dmft≥3的人数占总人数4.5%,dmft占总数的60.0%;3岁组dmft≥3的人数占总数的13.2%,dmft占总数的69.4%;4岁组dmft≥3的人数占总数的34.4%,dmft占总数的86.6%;5岁组dmft≥3的人数占总数的47.8%,dmft占总数的89.8%。结论儿童乳牙龋病存在两极化倾向,对龋患高危儿童需要重点预防。更多还原

【Abstract】 Objective To investigate dental caries polarization in 2₅ year_old children.Methods 3 799 random samples of 2₅ year_old children from attending kindergarten in Shenyang were selected. Means of dmft index and SiC index for each age group were calculated by WHO Collaborating Center. The subjects of each age group were further divided into subgroups of different level of dmft: the dmft of subgroup I was 0, the dmft of subgroup II was 1, the dmft of subgroup III was 2, the dmft of subgroup IV was equal to or more than 3. The obtained data were analyzed statistically with SPSS 10.0.Results 4.5% of 2_year_old children were carriers of 60.0% of the total dmft in that age group, 13.2% of 3_year_old children were carriers of 69.4% of the total dmft in that age group, 34.4% of 4_year_old children were carriers of 86.6% of the total dmft in that age group, and 47.8% of 5_year_old children were carriers of 89.8% of the total dmft of that age group.Conclusion This study supports the assertion that a small percentage of persons with high dental caries rate and a large percentage of caries_free persons of early childhood caries.更多还原