The prevalence of dental fluorosis of the children drinking low fluorine water was no difference no matter whether using fluoride dentifrice or not.
2
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。
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.
3
结果：儿童氟斑牙患病率，随着饮水氟含量的增加而升高，含氟牙膏使用组大于不使用组。
The survey was conducted for using of fluoridated toothpaste or not and the epidemic of dental fluorosis.
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