perfect teeth

想知道擁有完美牙齒的秘密?
氟化物是一種用於牙膏或其他護齒產品的化學物質。研究發現,鯊魚的牙齒是100%被氟化物覆蓋!有如此完善的保護,鯊魚們是不會有蛀牙的憂慮。再加上牠們的牙齒會定時更換,讓牠們能一直保持完美又健康的牙齒!

want to know the secret behind keeping the perfect teeth? study found the surface of sharks’ teeth are 100% covered with fluoride, a chemical we have in toothpaste and other dental care products. this shows that with this strong dental protection, sharks should never suffer from cavities! they also change their teeth regularly and that helps them remain their perfect and healthy teeth always!

http://news.discovery.com/animals/shark-teeth-flouride-120725.html

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