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材料与方法1．调查方法由原新沂县卫生局根据各乡村的组织能力、人员外流情况，选择了三个中心乡九个行政村的十余个自然村，以户为单位对5岁以上全体人员，进行口腔检查，共收得有效卡片9108张，各年龄组（表1）。表1调查样本性别年龄构成精查组共三十一人，其中五人为培训师
Materials and methods 1. Survey method Xinyi County Health Bureau by the original according to the organization of the ability of villages, the situation of staff outflow, chose three central township nine administrative villages of more than ten villages, households as a unit over the age of 5, oral examination , A total of 9108 valid cards were received, all age groups (Table 1). Table 1 Survey Sample Sex Age Constituent group A total of 31 people, of whom five were trainers