Interesting facts about teeth
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Interesting facts about teeth

   1. Human tooth - this is the only part of the body that can not recover on their own. KEEP YOUR TEETH !!! Meanwhile, the enamel is the hardest tissue produced by the body. And, despite the fact that calcium is essential for bone and 99% of the calcium in the body is concentrated in the teeth.
   2. Every year September 20 is celebrated in China, a national holiday "Day of Love to their teeth." Unfortunately, in our country there is such a holiday ...
   3. The struggle for healthy teeth is paying off! For example, in Finland in 70 years it adopted a special state program for children and teenagers to seal fissures in the teeth (which reduces the risk of caries in several times). To date, most of them are not needed in the prosthesis. According to the American Dental Association, more than half of American school children have audio cavity on permanent teeth, while 40 years ago there was only 26%.
   4. It is believed that the first toothpaste appeared in Egypt about 5,000 years ago. In those days, she prepared from wine and pumice. And the ancient Japanese dentists teeth removed with bare hands. For training, they pulled tightly hammered nails into a board.