A toothbrush design by Dr. Kunio Komiyama, a dentistry professor emeritus at the University of Saskatchewan relies on solar power and a chemical reaction to brush your teeth instead of hand power and toothpaste. A solar panel at the bottom of the toothbrush sends a series of electrons up into your mouth. These electrons react with acid in your saliva that creates a bacteria killing chemical reaction. The brush needs only a minimal amount of light- the same as a solar calculator. The prizewinning toothbrush design will soon be field tested by 120 teenagers (are all dental product tested on teenagers?)
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