It is recommended to brush your teeth twice a day to maintain good oral hygiene, and it is advised to perform a quick brushing right before a dental appointment.

noli's read

The recommendation to brush teeth twice a day is firmly rooted in health guidelines, validated by the American Dental Association (ADA) based on numerous observational studies. An expert consensus published by the Fédération Dentaire Internationale (FDI) confirms that this twice-daily frequency effectively disrupts dental plaque before it calcifies. Furthermore, a meta-analysis published in the Journal of Dental Research shows that regular brushing significantly reduces the risk of enamel degradation. Regarding brushing just before visiting the dentist, there is no strict clinical evidence demonstrating a direct long-term effect on gum health. This action is rather a matter of courtesy and examination comfort, facilitating direct access to surfaces by removing recent food debris. It is, however, useful to note that last-minute brushing cannot erase weeks of neglect, as established tartar can only be removed through professional cleaning.

the sources

No named source held this one up — that absence is part of the verdict.