Did you know that teeth are not bones, but rather skin?

It is logical to assume that teeth are such bones. They are white, hard, bone-like in appearance, isn’t that enough? But no, according to science, teeth have nothing to do with bones. What’s more, they have more in common with your skin than your bones! Sound crazy? Let’s try to figure it out.

Both bones and teeth are white and hard, but they are arranged differently . Teeth are made up of calcium, phosphorus and other minerals. Bones also contain these substances, but in much smaller quantities. They are mostly made up of a protein called collagen and are covered on the outside with periosteum, the living tissue that feeds bone cells.

The material of the bones allows them to grow and regenerate – broken bones grow back together. Tooth enamel is inanimate, it is incapable of regeneration, so a cracked or broken tooth cannot grow together. But enamel is the hardest tissue of the human body, capable of withstanding loads that your ribs cannot bear.

Teeth differ in structure from bones, because they did not originate from them, but from fish scales, which our distant ancestors were equipped with.

Long ago, 410 million years ago, cartilaginous fish decided that biting prey was more convenient than trying to swallow it whole. And they began to grow dentin -reinforced scales on their snouts, which helped to better grab and tear food apart. Significantly changed over millions of years, dentin scales now stick out in your mouth and in you.

In the same way, your skin and hair share a common origin with scales. It has been proven that the development of teeth, skin and hair in humans is still regulated by the same set of genes as the growth of scales in fish. So your teeth, from the point of view of evolution , are not bones, but highly modified skin.

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