Developmental defect of enamel and dental caries in 1074 primary school children were investigated using the simplified DDE index.
本研究采用简化的DDE指数，对1074名城乡学龄前儿童进行乳牙釉质发育缺陷和龋齿的现况调查。
Developmental defect of enamel and dental caries in 1074 primary school children were investigated using the simplified DDE index.
本研究采用简化的DDE指数，对1074名城乡学龄前儿童进行乳牙釉质发育缺陷和龋齿的现况调查。
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