It's a standard recommendation across the U.S. dental profession. Department of Education, that both children and adults visit a dentist every six months for a cleaning and oral exam. For adults, the recommended frequency for dental checkups varies.
However, in most studies, regular assistants are considered to be those who visit the dentist at least once a year. How often you visit your dentist will depend on your own oral health needs and whether you are prone to tooth decay, gum problems, or oral health problems. How quickly dental stains and plaque develop on teeth will also vary from person to person, and some people may benefit from a more frequent cleaning program if their teeth are more likely to stain or build up stones. It is usually said that you should go to the dentist twice a year.
When in doubt, this is a good general rule to follow. But if you want to be sure how often you need a dental checkup, you should consider your unique mouth, hygiene, habits, and general well-being. The Center for Disease Control (CDC) reports that gum disease in the United States affects nearly 47% of adults over the age of 30.