Principles of Electric Toothbrush Technology
In 1954, Swiss doctor Philippe-Guy Woog invented the electric toothbrush. Sixty years later, the electric toothbrush is very similar to its predecessors. In principle, there are two categories of electric toothbrushes: rotation and vibration. Rotary toothbrushes have a simple principle, that is, the motor drives the round brush head to rotate, which enhances the friction…