There are no high quality data to support the common recommendation that people get dental checkups every 6 months, according to The Cochrane Collaboration, which reviews literature on the relative effectiveness of different health care practices.
Reviewing the best available data led the Cochrane Authors to conclude that there is not enough evidence to draw any conclusions regarding the potential effects, good or bad, of altering the recall interval between dental check-ups.
“There is insufficient evidence to support or refute the practice of encouraging patients to attend for dental check-ups at six-monthly intervals,” says the review’s lead author.