Today, everybody knows that we have to brush our teeth. But not too long ago, that was a new idea.
The first toothbrushes weren't made of plastic like the toothbrushes today are. Back in the 1800s, they were made of animal bones and hair. As you might imagine, they didn't work very well. In 1938, an American company made the first plastic toothbrush.
People started using floss a long time before they started brushing their teeth. Scientists have found teeth from humans who lived thousands of years ago that show that some of them flossed their teeth.
PHOTO : AP
As for toothpaste, people have made it out of all kinds of different ingredients throughout history. In America in the 1700s, some people made toothpaste out of bread, and in the 1800s they made it out of charcoal! (Marc Langer, staff writer)
現今，人人都知道要刷牙。不過這可是個在不久之前才出現的新點子。
世上第一隻牙刷並非像今日的牙刷一樣是由塑膠製成的。回溯至十九世紀，牙刷是用動物骨骸與毛髮製成的。你可以想像，它們並不是很好用。一九三八年，美國一家公司率先推出世界上第一隻塑膠牙刷。
早在人們開始刷牙前，就已使用牙線。科學家由數千年前人類的牙齒發現，有些人用牙線剔牙。
至於牙膏，縱觀古今歷史，人們曾使用五花八門的材料來製造牙膏。十八世紀時，有些美國人利用麵包來製造牙膏，而在十九世紀，人們則是用木炭來製造牙膏。
（翻譯：賴美君）
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