加拿大萨斯克彻温大学（University of Saskatchewan College）牙科学专业的牙科医师小宫山·邦雄（Kunio Komiyama）博士设计出了一种新型的“太阳能牙刷”，这种牙刷不需要牙膏就能清洁口腔。
Dr. Kunio Komiyama, a dentist at the University of Saskatchewan College of Dentistry in Canada, designed a new “solar-powered toothbrush” that cleanses the mouth without using toothpaste.
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