Your dentist will advise that the optimum time to brush your teeth for is two minutes. This recommendation is endorsed by the American Dental Association and is backed by scientific evidence.
Various studies have shown:
– One minutes’ brushing removes 27% plaque. Two minutes’ brushing removes 41%
– Plaque that isn’t removed can harden into tartar which only a dentist is able to remove
– Four minutes brushing a day (i.e. two times two minutes) is sufficient to maintain good oral hygiene and health, along with regular visits to the dentist
“If you brush for fewer than two minutes twice a day, you might not be cleaning your teeth thoroughly.”
Read more and get more in-depth information about studies behind the science here https://www.self.com/story/how-long-to-brush-teeth