Methods:This study included 200 children with histories of low birth weight or premature infant, their incidence of the dental caries and developmental enamel defects were surveyed.

方法：选取低出生体重儿、早产儿及正常出生体重儿各2 0 0例进行乳牙龋齿、釉质发育缺陷统计调查。

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Methods:This study included 200 children with histories of low birth weight or premature infant, their incidence of the dental caries and developmental enamel defects were surveyed.

方法：选取低出生体重儿、早产儿及正常出生体重儿各2 0 0例进行乳牙龋齿、釉质发育缺陷统计调查。

youdao