An electric toothbrush is a toothbrush that cleans teeth using quick, automatic bristle movements such as rotational oscillation or back-and-forth oscillation. A motor propels objects at or below sonic speeds.
Electric Toothbrush
An electric toothbrush is a toothbrush that cleans teeth using quick, automatic bristle movements such as rotational oscillation or back-and-forth oscillation. A motor propels objects at or below sonic speeds.