What trace mineral toxicity causes tooth mottling and how?
What will be an ideal response?
In the early 1930s, it was observed that individuals living in the southwestern U.S., where the water naturally contained high concentrations of fluoride, had fewer dental caries (cavities). Many people in these areas also had small spots on their teeth (known as mottling or fluorosis) due to excess fluoride (Fig. 15-19). Although discolored, the mottled teeth were virtually free of dental caries. This discovery led to research studies confirming this mineral's ability to reduce cavities and the start of controlled water fluoridation in parts of the U.S .
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