For most people, brushing their teeth twice a day and flossing once a day is ideal. This gets is enough to get off most of the bacteria before it hardens and has the chance to cause a gum infection or other dental problems. For those patients who are prone to cavities and heavy buildup on their teeth, brushing 3 times a day can help to minimize risk. We recommend waiting 30 minutes after eating to brush however, so the the pH of your saliva can return to a more neutral level.