我国4、5、6岁儿童乳牙患龋率分别为60％、78％和82％,我们调查哈尔滨市3所幼儿园1649名4～6岁儿童乳牙平均患龋率高达87.81％,龋均为4.7颗,儿童乳牙患龋率之高严重地危害着儿童身心健康,因此防龋工作必须抓早、抓小。为此,我所预防保健科与哈尔滨市妇幼保健院共同于1991年9月在哈尔滨市3所幼儿园1649名4～6岁儿童中开展了口腔健康保 The prevalence of deciduous teeth among 4, 5, 6-year-old children in our country was 60%, 78% and 82%, respectively. We investigated the average prevalence of deciduous teeth among 1649 children aged 4 ~ 6 years old in 87 kindergartens in Harbin, Children, deciduous teeth of children suffering from a high rate of serious harm to children’s physical and mental health, therefore, prevention of dental caries must grasp early, pay attention to small. To this end, I Prevention Health Branch and Harbin MCH together in September 1991 in Harbin, 3 kindergartens 1649 children aged 4 to 6 years to carry out oral health insurance