目的：了解牙齿卫生与小学生龋病发生的相关情况。
Objective: To understand the primary health and dental caries in the relevant circumstances.
目的了解广州市东山区4770名小学生的营养状况和常见病的患病情况。
Objective To investigate the health status among 4770 pupils in Guangzhou City.
目的旨在了解泰州市小学生口腔疾患的患病情况。
Objective: To understand the oral disease prevalence in junior school in Taizhou.
目的旨在了解泰州市小学生口腔疾患的患病情况。
Objective: To understand the oral disease prevalence in junior school in Taizhou.
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