Remineralization occurs when vital minerals—like calcium—bond to the teeth to fill in the weakened areas of enamel. These minerals need to be present in saliva to facilitate the process. You can get many of these minerals from the foods you eat, such as cheese and other dairy products, fiber-rich fruits and vegetables, or poultry and seafood. However, modern diets are highly acidic, and your teeth may need some extra help to promote remineralization.