'''Fluoride''' (F<sup>-</sup>) is the mildly [[toxic]] [[ion]]ic form of the element [[fluorine]]. It is a common additive to [[toothpaste]], [[mouthwash]], and city [[water]] throughout the developed world. It is commonly thought to work to prevent [[tooth decay]]. | '''Fluoride''' (F<sup>-</sup>) is the mildly [[toxic]] [[ion]]ic form of the element [[fluorine]]. It is a common additive to [[toothpaste]], [[mouthwash]], and city [[water]] throughout the developed world. It is commonly thought to work to prevent [[tooth decay]]. |