'''Fluoride''' (F<sup>-</sup>) is the mildly [[toxic]] [[ion]]ic form of the element [[fluorine]]. It is a common additive to [[toothpaste]], [[mouthwash]], and [[Water fluoridation|city water]] throughout the developed world. It is commonly believed to prevent [[tooth decay]], since it tends to bond with the calcium in teeth. | '''Fluoride''' (F<sup>-</sup>) is the mildly [[toxic]] [[ion]]ic form of the element [[fluorine]]. It is a common additive to [[toothpaste]], [[mouthwash]], and [[Water fluoridation|city water]] throughout the developed world. It is commonly believed to prevent [[tooth decay]], since it tends to bond with the calcium in teeth. |