Kari Sakurai, D.D.S. reveals tips to make a dull winter smile gleam. Plus, see how a new toothbrush with ultrasonic technology requires no brushing at all! The Emmi-Dent Ultrasonic Toothbrush effectively cleans teeth and gums without friction, and instead uses ultrasonic vibrations with 96 million oscillations per minute. In addition, the Emmi-Dent can help destroy tartar and plaque buildup, as well as kill germs and bacteria under the gums where no bristles, mouthwash or floss can reach.