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长沙市口腔医院于 2 0 0 1年 9月至 2 0 0 2年 9月对长沙市城区楚怡小学等 2 918人 ,长沙县春华山小学等2 783人 ,分成 7～、9～、11～、12～ 13岁 4个年龄段进行恒牙患龋情况调查 ,结果报导如下。1 对象和方法1·1 调查对象 选长沙城区和农村 7～、9～、11～、12～ 13岁 4
From September 2001 to September 2002, Changsha Dental Hospital had 2 918 people such as Chuyi Primary School in Changsha City, and 2 783 people in Changsha Huachunshan Primary School, divided into 7～, 9～, 11 The investigation of the situation of permanent tooth caries in 4 age groups from ~12 to 13 years old was reported as follows. 1 Subjects and methods 1.1 Survey respondents Changsha city and rural areas 7～, 9～, 11～, 12～ 13 years old 4