But too much fluoride, especially for children who's adult teeth are still forming can lead to a problem called dental fluorosis when white patches form on teeth.
但是过多的氟化物，尤其是对于儿童来说，成年人的牙齿还在形成阶段，当牙齿上形成白色斑块时，就会导致一种叫做氟斑牙的问题。
Dental fluorosis
原声例句
CNN 10 学生英语 2019年4月合集
英语百科
Dental fluorosis
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![Severe fluorosis: brown discolored and mottled enamel of an individual from a region with high levels of naturally occurring fluoride](/Images/godic/202501/08/4724507933_07ac954c27_bFluorose0847.jpg")
![Severe fluorosis: the enamel is pitted and discolored](/Images/godic/202501/08/FluorosisFromNIH0848.jpg")
![Amelogenesis imperfecta: this condition can be mistaken for fluorosis](/Images/godic/202501/08/G_amelogenesis_imperfecta0848.jpg")
Dental fluorosis (also termed mottled enamel) is hypomineralization of tooth enamel caused by ingestion of excessive fluoride during enamel formation.
It appears as a range of visual changes in enamel causing degrees of intrinsic tooth discoloration. The severity of the condition is dependent on the dose, duration and age of the individual during the exposure. In the mildest form (which is the most common) there are faint white lines or specks. Slightly more severe cases appear as white mottled patches, while severe fluorosis is characterized by brown discoloration and brittle, pitted and rough enamel.
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