Regardless of how you feel about your oral health, it's important to visit a dentist regularly. A good rule of thumb is to go for a checkup at least once a year, although some research suggests that those with a low risk of dental disease can wait up to 18-24 months. However, the frequency of your visits should be tailored to your individual needs. Factors such as your oral hygiene habits, general well-being, and the dentist's ability to recognize early signs of disease can all affect how often you should go.
Moles et al in 1999 conducted a computer simulation to determine optimal recall intervals, concluding that patients would benefit most if dentists attended at intervals ranging from 13 to 120 months. Ultimately, it's best to consult with your dentist to determine the best schedule for you.