The electric toothbrush quickly breaks down the toothpaste into fine foam through the rapid rotation or vibration of the motor core, which deeply cleans the teeth. Electric toothbrush heads are basically smaller than ordinary toothbrushes, and ca n’t be cleaned easily, such as behind wisdom teeth.
Sound waves are mechanical longitudinal waves that propagate in elastic media. Their frequency is 20-20000 Hz and can be heard by the human ear.
The use of a motor to drive the swing arm simulates manual tooth brushing, but it is faster and more violent (it can be called a simple polishing machine!). The brush head and bristles rotate or reciprocate, rub directly on your teeth, and achieve cleaning results through friction, which causes greater physical wear on the teeth.
The high-speed motion of the motor generates vibration, which is transmitted to the bristles, generating a slight and rapid motion, and the cleaning effect is achieved by the vibration. Sonic toothbrushes are easier to clean in places like the sulcus, and have less physical wear on the teeth.
Dry type, also called battery type, is an internal non-rechargeable dry battery as a power source. The advantage is that it is easy to carry, and the disadvantage is that the battery cost is high.
The so-called inductive charging is non-contact charging. It is wrapped with a rubber-plastic insulation layer so that there is no direct line contact between the inductive charger and the external device to be charged. There is no electrical safety problem and it is more safe and reliable to use.