How Electric Toothbrushes Work

Electric toothbrushes mainly fall into two categories based on their working principle: sonic electric toothbrushes and rotary electric toothbrushes.

Sonic Electric Toothbrush:

Primarily operates using an internal miniature DC motor, which drives the brush head to oscillate rapidly from side to side, generating mechanical vibrations, i.e., sound waves.

The sound wave frequency generated by a sonic electric toothbrush during operation is typically above 260 times per second. This high-frequency vibration more effectively breaks down toothpaste into fine foam, penetrating deep into the gaps between teeth to separate plaque and food debris from the tooth surface and crevices, thus achieving a better cleaning effect.

Rotary Electric Toothbrush:

Utilizes an internal motor to drive a circular brush head to rotate, enhancing the friction effect on the teeth and thus more effectively removing plaque and food debris.

Rotary electric toothbrush heads typically offer several different rotation modes, such as unidirectional rotation, bidirectional rotation, and multi-angle rotation.