pre-enamel
称为出生前釉质 prenatal enamel
出生前釉质 prenatal enamel
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.
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