通过对两所幼儿园3岁组儿童乳牙龋发生、变化情况的一年观察,并进行配对比较分析,结果表明: 1 3～4岁是儿童乳牙龋进展较迅速时期〔男、女儿童组乳牙龋患率4周岁(一年后)均显著高于3周岁时(一年前),男生组x~2=6.20,p<0.025;女生组x~2=7.17,p<0.01。〕 2 男、女儿童组的乳牙龋均、患者龋均、平均龋面、患者龋面一年后均比一年前 The results showed that: 1 ~ 4 years old children with deciduous caries progressed more rapidly [male and female children deciduous teeth caries The prevalence rate of 4-year-old patients (one year later) was significantly higher than that of 3-year-olds (a year ago). The boys group had x ~ 2 = 6.20, p <0.025; 〕 2 male and female children group of deciduous caries were caries, the average caries, the caries of patients a year later than a year ago