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。
Conclusion: The using of fluoridated toothpaste increased the fluoride intake in the children in defluoridated areas, which caused the increasing of prevalence of dental fluorosis.
结论：改水降氟区儿童使用含氟牙膏增加了儿童的摄氟量，会引起儿童氟斑牙患病率的增加。
The prevalence of dental fluorosis of the children drinking low fluorine water was no difference no matter whether using fluoride dentifrice or not.
饮用低氟水的儿童无论是否使用含氟牙膏，其氟斑牙患病率间没有差别。
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