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The latest toothbrush that's not a toothbrush

from Chicago Tribune

Emmi-dent. It's the toothbrush you're not supposed to brush your teeth with. But that's not to say you shouldn't use it regularly. Like any other toothbrush, Emmi-dent has a head full of bristles. But they're for transmitting ultrasonic impulses from a microchip inside the brush head. When these impulses interact with Emmi-dent's own toothpaste, they cause millions of infinitesimal "nano-bubbles" to form and then collapse. To the bacteria in your mouth, this mass bubble implosion is cataclysmic. The energy released breaks their outer membranes and they die. more


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