Ultreo has introduced a toothbrush that combines sonic waves with something called "ultrasound waveguide technology." The Ultrasound Toothbrush($170) features use this sonic bristle create bubbles that effective at targeting nooks and crannies (it's clinically proven to remove up to 95 percent of hard-to-reach plaque in 60 seconds). And it included 2-minute Auto Shut Off Timer, 30-second Brushing Interval Signal function.
