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.

其实是利用一种药牙齿自动用牙质填补牙洞。

The more the enamel is damaged, the more the yellow dentine below starts to become visible.

牙釉质损越严重，其下黄色的牙本质就越。

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。

Now, dentine is actually yellow, which explains why our teeth gradually turn that colour when the enamel wears away.

实际上，牙本质是黄色的，这就解释了为什么当牙釉质磨损时，我们的牙齿会逐渐变成那种颜色。

The same goes for dentine, which is the calcified tissue that lies underneath tooth enamel, protecting the dental pulp encased within.

同样，牙本质也是如此，它是一种位于牙釉质下方、保护着其中牙髓的钙化组织。