Topical uses include brushing with fluoridated toothpaste or using fluoride mouth rinses. Systemic use refers to the ingestion of fluoride through fluoride supplements or by drinking fluoridated water. There is no chemical difference in the fluoride that is provided by either natural or adjusted means. And there is no difference in the dental benefits of water that contains the optimal level of fluoride whether the fluoride is naturally occurring or added. Research has shown that the tooth decay preventing effects of fluoride are not limited to children.
Adults obtain substantial benefits as well.
Fluoride is beneficial to adults in two ways. The first is by the remineralization of beginning cavities from frequent exposure to small amounts of fluoride. The other protective benefit is in the prevention of cavities in individuals who have gum recession. Individuals who have gums that are receding are at higher risk of developing cavities on the surface of the roots of their teeth. In addition, there is some evidence to show that higher levels of fluoride strengthen the bones of older people, thus reducing the incidence of bone fractures.