What if the tooth could repair itself with its own material – dentine?

如果牙齿利用牙质实现自我修复会怎样呢？

It uses a drug that causes the tooth to fill in the hole naturally with dentine.

其实是利用一种药物激活牙齿自动用牙质填补牙洞。

These express genes that produce dentine, another type of hard tissue that lies beneath the outer enamel.

这些细胞表达产生牙本质的基因，这是位于外层釉质下面的另一种硬组织类型。

Placoderm means " plate skin, " and plated they indeed were, with big chunks of bone, dentine and enameloid armor on their head and bodies.

Placoderm 的意思是“镀层皮肤” ，他们确实是镀层的，头部和身体上有大块的骨头、牙本质和珐琅质盔甲。

If you're picturing skin covered in human teeth - just stop, that's terrifying These " skin-teeth" were really more like bumps made of dentine, which is the hard tissue found underneath the enamel of your teeth.

如果你想象的是人类牙齿覆盖的皮肤——停下来，那太可怕了。 这些“皮肤牙齿” 实际上更像是由牙本质构成的肿块，牙本质是牙齿珐琅质下面的硬组织。

Because this surface is made up of many teeth, and the outer enamel layer of the tooth would wear down slower than the inner dentine layer, the teeth themselves, would wear down at an uneven rate.

因为这个表面由许多牙齿组成，而牙齿的外牙釉质层比内牙本质层磨损得慢，牙齿本身会以不均匀的速度磨损。