1996年10～11月份我们对南京市部分小学进行了调查，重点对龋齿的好发年龄及不同年龄的好发牙位进行调查分析，现将调查结果报告如下。1调查对象与方法1．1对象随机抽取南京市城、郊小学生4285名．其中城区2561名，男1353名，女12OS名，郊县1724名，男938名，女786名，年龄为7 From October to November 1996, we conducted a survey on some primary schools in Nanjing City, focusing on the age of onset of dental caries and the occurrence of odontogenic teeth of different ages. The findings are reported as follows. A survey of objects and methods 1.1 object randomly selected Nanjing City, 4285 pupils in the suburbs. Among them, 2561 are urban areas, 1353 are male, 12 are female, 1724 are suburban, 938 are male and 786 are female, with an age of 7