Brushing teeth with an electric toothbrush is different from a manual toothbrush.
The electric toothbrush can generate high-frequency vibration of the brush head through the rapid rotation or vibration of the motor core, which instantly breaks down the toothpaste into fine bubbles and y cleans the tooth gap, while at the same time, the fluttering of the bristles promotes the blood circulation of the oral cavity, and has a massaging effect on the gum tissues.
With an electric toothbrush you don't have to pull across like a manual toothbrush, just gently place the toothbrush on your teeth and slowly move it along the gum line. And, of course, the strength is freely available.
Expanded:
From the principle, electric toothbrushes have two main categories: rotating and vibrating. The rotating type of toothbrush principle is simple, that is, the motor drives the round brush head to rotate, in the implementation of the ordinary brushing action at the same time to strengthen the friction effect, rotating type of toothbrush noise, the teeth surface cleaning is very clean, the teeth cleaning is relatively weak, but on the teeth of the wear and tear, is not recommended for long-term use.
Vibrating types of toothbrushes are more complex and more high-end in terms of price. Vibrating type toothbrushes have an electrically driven vibration motor inside, which allows the brush head to produce high-frequency oscillations perpendicular to the direction of the brush handle, but the amplitude of the oscillations is small, generally about 5 millimeters above and below, and the industry's largest oscillation is 6 millimeters.
Baidu Encyclopedia - Electric Toothbrush