How a sonic toothbrush motor works

1. The motor produces rapid vibrations

At the heart of the sonic toothbrush is a small electric motor. This motor generates very high-frequency vibrations, typically between 30,000 and 40,000 movements per minute.

2. Transmission of vibrations to the brush head

The motor is connected to the brush head by a shaft. When the motor rotates, it vibrates this shaft, which transmits the vibrational energy to the brush head and its bristles.

Diagram illustrating the operation of a toothbrush's sonic motor: the motor generates rapid vibrations transmitted to the brush head, creating a hydrodynamic effect that effectively cleans teeth and interdental spaces.

3. The hairs vibrate very quickly

The bristles on the head vibrate back and forth at high speed. This mechanical action helps to loosen plaque and food debris from the surface of the teeth and along the gums.

Nomad sonic toothbrush with 65 brushing modes: novice, gentle, clean, whitening, polishing and massage, adapted to all dental needs

4. Creation of a hydrodynamic effect

The vibrations also create a hydrodynamic effect: the mixture of saliva, water, and toothpaste is set in motion, forming small waves that clean even the hard-to-reach spaces between the teeth.

5. Result: effective and gentle cleaning

Thanks to the combination of the mechanical movement of the bristles and the hydrodynamic action, the sonic toothbrush effectively cleans teeth, even in difficult areas, while respecting the gums.