根据《全国口腔健康流行病学调查》，从长沙市及近郊农村各三所小学中随机抽取１２６０名７～１２岁儿童，以问卷形式对其刷牙知识及行为对其进行调查。结果表明：城市儿童３岁时刷牙率为５２．８８％，而农村为０；城市儿童掌握刷牙知识的正确率高于农村儿童。提示应加强城乡幼儿园和小学儿童的牙防宣教工作。 According to the National Epidemiological Survey of Oral Health, 1260 children aged 7-12 years were randomly selected from three primary schools in Changsha and rural areas in rural areas to investigate their knowledge and behavior of brushing their teeth. The results showed that the urban children's brushing rate at the age of 3 was 52.88%, while that in the rural areas was 0. The correct rate of urban children's knowledge of brushing was higher than that of rural children. It is suggested that dental education in urban and rural kindergartens and elementary schools should be strengthened.