Roll and flick movement

Historically, popular dental advice was that one should employ a "roll and flick" technique whilst brushing one's teeth. As you can hear in this example, (which was enacted with a denture brush on a set of ivory dentures) the sound of this motion is quite different to the sounds we now associate with brushing our teeth. Both the ivory dentures and the denture brush used to produce this sound are in the collection of the British Dental Association Museum.