Ultrasonic toothbrush
Introduction Ultrasonic toothbrushes and sonic toothbrushes are often used as synonyms, but have fundamentally different functions. While sonic toothbrushes work by mechanical friction, the application of the ultrasonic toothbrush requires a special toothpaste whose particles are set in motion by the vibrations. But what makes an ultrasonic toothbrush better than a pure rotary toothbrush and … Ultrasonic toothbrush