As an added level of protection against dental decay, it is recommended to receive periodic fluoride treatments as part of a program of preventive dental care. Fluoride treatments may also be indicated in adults who are at a higher risk for developing tooth decay. Fluoride is a naturally occurring mineral that helps to prevent cavities by making the hard outer enamel of the teeth more resistant to the acids produced by the harmful sugar processing bacteria in dental plaque. It can also help to remineralize the teeth to reverse incipient decay.