Maintain good oral hygiene by brushing your teeth thoroughly at least twice a day with a fluoridated toothpaste, and flossing
at least once a day.
Regular dentist visits for cleaning and a checkup are crucial and recommended at least every 6 months. If you have any cavities, get them filled; and if you smoke, stop. Avoiding sugary drinks & sodas, plus avoiding sugary starchy snacks, also helps.