Sonic toothbrushes have a rotating head and bristles, but in addition emit sound waves. The sound waves create a vibration that helps, in conjunction with the bristles, to loosen and plague and particles. This is the same technology that your dentist uses in the office to help remove plague. As you can tell after a professional cleaning, sound waves can be very effective. The next type of toothbrush is the Ionic Toothbrush.
Ionic toothbrushes work by reversing the polarity of the teeth.
Your teeth naturally have a negative ionic charge. Food particles naturally have a positive ionic charge. These opposite charges are attracted to each other causing food particles to stick to your teeth. Think of it as holding two opposite magnets near each other. The ionic toothbrush temporarily changes the tooth s negative ionic charge to a positive charge.