It is among the first lessons a child is taught: how to brush your teeth correctly. But what is "correct" when it comes to manual toothbrushing? According to the authors of a new study in the British ...

I’m an adult, of course, I know how to brush my teeth. That’s what most of us think. After all, it’s something we’ve done every day since childhood, so surely we’ve mastered it by now. But when we ...