Too much dentistryA 2020 Cochrane review that assessed the two clinical trials concluded that "whether adults see their dentist for a check‐up every six months or at personalized intervals based on their dentist's assessment of their risk of dental disease does not affect tooth decay, gum disease, or quality of life. Longer intervals (up to 24 months) between check‐ups may not negatively affect these outcomes." The Cochrane reviewers reported that they were "confident" of little to no difference between 6-month and risk-based check-ups and were "moderately confident" that going up to 24-month checkups would make little to no difference either.
This conveniently validates me not going to the dentist for about a year and a half. I should probably read the actual paper, though.