For most people, twice a year is usually sufficient; however, only you, your dentist and your hygienist can determine how often is actually necessary. Checkups are needed for regular assessments of the condition and well being of your mouth; therefore, regular checkups are a MUST in order to maintain a healthy, happy smile!
Remember, in order to maintain good dental health and prevent tooth decay it is important to brush at least twice a day, floss regularly, eat balanced meals, reduce sugary snacks, and visit your dentist on a regular basis.