Three elements are essential to make tooth decay possible: teeth, bacteria and sugar. Remove only one of these elements and tooth decay is no longer possible. Which one do you think is easier to remove?
When you have a cavity on one of your teeth, it is a sign that things have been out of balance in your mouth for quite a while. Either you are snacking too often, using something else than water to quench your thirst every day, you are not brushing and flossing well enough and daily… and you probably have an excess of acid producing bacteria in your mouth… Whatever it is, with a little crime scene investigation from your dentist the cause(s) can be found and eliminated. Once this is done and you follow your dentists recommendations, you can look at a cavity free future