1999年 4月对怀远县城关镇 3480名小学生患龋情况进行调查 ,报告如下 :1　对象和方法城关镇小学 8— 12岁小学生 3480名 ,其中男 1813名 ,女16 87名。按《口腔内科学》(第二片 )所载方法 ,对每一对象的牙齿进行逐个检查 ,记录乳牙、恒牙的龋齿数。2　结果2 .1　龋齿患病率和龋 April 1999 Huaiyuan County Chengguan 3480 primary school students caries situation survey, the report is as follows: 1 objects and methods Chengguan primary school pupils 8-12 years old 3480, of which 1813 were males and 1687 females. According to the “oral science” (second piece) contained in the method, one by one on each subject’s teeth check, record deciduous teeth, permanent teeth, the number of dental caries. 2 results 2.1 caries prevalence and caries