Diagnostic dentistry allows dentists to spot oral health issues in their patients before they turn into costly, painful, or time-consuming problems. A dentist is more likely to spot oral health problems than your general physician, so don’t skip dental diagnostic checkups even if you go to your trusted doctor regularly. The American Dental Association (ADA) recommends at least two dental cleanings and two diagnostic checkups per year. This schedule has been shown to reduce the risk of developing oral health problems.