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１９９６年底对１７７１名７～１２岁年龄组儿童的患龋病情况进行调查，现报告如下：１ 调查对象郑州市一所市级重点小学７～１２岁替牙时期儿童１７７１名。２ 方法按《龋病－牙周病全国统计调查表规定》对小学生进行调查。凡恒牙龋、乳牙龋均作为龋齿计算。检查方法依靠视
The end of 1996 of 1771 children aged 7 to 12 years of age with caries investigation, are reported as follows: 1 respondents Zhengzhou City Key Primary School 7 to 12 years old 1717 dentition period children. 2 Methods According to “dental caries - periodontal disease national statistical questionnaire” on primary school students to investigate. Where permanent teeth caries, deciduous caries are calculated as dental caries. Inspection method depends on the visual