According to Drs. Coyle, Scott and Stine and the American Dental Association, you should be brushing your teeth at least three times a day. Brushing keeps your teeth, gums, and mouth clean and healthy by removing bacteria causing plaque. It is also recommended that when you brush your teeth, you use a soft bristle toothbrush and toothpaste that contains fluoride. You should spend at least two minutes on the top teeth and two minutes on the bottom teeth, and remember to brush your tongue; it will help keep your breath smelling fresh!