Methods The fluoride contents were tested by fluoride selective ion electrode, dental fluorosis prevalence rate of children was examined according to clinical diagnosis standard.

方法：水氟含量采用氟离子选择电极法进行检测，儿童氟斑牙采用三型九度法。

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Methods The fluoride contents were tested by fluoride selective ion electrode, dental fluorosis prevalence rate of children was examined according to clinical diagnosis standard.

方法：水氟含量采用氟离子选择电极法进行检测，儿童氟斑牙采用三型九度法。

youdao