Emmi-dent is a patented toothbrush that has an ultrasonic microchip that is positioned right in the head of the brush. When used with the special toothbrush that was created for it, the effects are much more effective than a regular toothbrush. The Emmi-dent toothbrush oscillates up to 84 million times per minute. Germs and bacteria that are unreachable by other tootbrushes, floss, and even mouth wash are reachable with this product. It helps fight gum disease and improves the blood flow in the gum area. It is motionless and does not affect your enamel so it is gentle to use.