White smile always attracts attention and makes us younger. However, tooth enamel tends to darken, scientists have found a way to cope with this problem.
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American society of chemistry has released a video which talks about the science of teeth whitening.
The authors of the movie have reported that the tooth enamel consists mainly of mineral called hydroxyapatite, which is a combination of calcium and phosphate ions in the form of crystals. However, the molecules of food and water make their way through these crystals.
All known standard prisposobleniya to care for the oral cavity like tooth
In September started an official sales of iPhone 7 and iPhone 7 Plus. Neither the launch of new Apple products is not without intense media attention, so any bug is in danger of becoming a tragedy of world proportions. One has only to recall the issue with the deterioration of communication in the