Around the world, billions are affected by tooth decay stemming from the loss of tooth enamel.
The evolution of our teeth has been ongoing for hundreds of millions of years. The outer layer of the tooth is enamel, the hardest tissue in the human body.
Unlike other tissues such as muscle and skin, enamel is an inorganic material. When it breaks or chips, it will not regenerate itself.
So, a variety of artificial materials have been developed as replacements.
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