为了掌握本县城关中小学生龋齿患病情况，并研究其变化特点和规律，以便今后进一步做好预防工作，１９９６年３月我们选择了城关地区两所小学，一所中学共２６８８名６至１７周岁学生进行了调查。１调查方法１．１采用口腔常规检查。１．２实际年龄确定检测当日已过本年生... In order to grasp the prevalence of dental caries among primary and secondary school students in Chengguan County and to study its changing characteristics and regularities in order to further prevent the disease in future, we selected two primary schools in Chengguan district in March 1996, and a total of 2688 students aged 6-17 in a secondary school Students conducted a survey. A survey method 1.1 using oral routine examination. 1.2 The actual age of the detection date has passed the annual ...