Each day, foods and acids feed bacteria in your mouth, which can accumulate on your teeth to form plaque. Plaque wears away at a tooth’s enamel in a process known as demineralization. Fluoride is a naturally-occurring mineral that can promote the remineralization of enamel, replacing important minerals that strengthen your teeth and can protect them from decay. Fluoride can also help reverse early stages of decay. Children with newly-erupted permanent teeth benefit a great deal from fluoride exposure, but adults should make sure their teeth come into contact with it, too. The safe and easy way to ensure your teeth are getting enough fluoride is to use fluoride toothpaste, available at drugstores in a variety of types and flavors. If Dr. Seminara recommends more intense fluoride treatments, there are a number of gels, rinses, or even in-office procedures that can do the trick. Though the most fluoride is absorbed from direct contact with the teeth, many public drinking water systems contain small, safe amounts of fluoride that can have positive health effects. Unfortunately at the present time, the water in Montreal does not have added fluoride.