Objective To investigate oral health status and guide oral health care in primary and middle school students.

目的调查中小学生口腔健康状况，以指导中小学生口腔保健。

youdao

Objective To investigate oral health status and guide oral health care in primary and middle school students.

目的调查中小学生口腔健康状况，以指导中小学生口腔保健。

youdao