Tooth mousse, it's meant to protect the enamel on your teenth.

护素，用来保护质的。

We lose the enamel of teeth.

我们失去质。

Enamel is the hard mineralized outer layer of the tooth.

质是坚硬的矿化外层。

The tooth has an enamel covering so it's relatively shiny.

表层有质 所以稍微亮些。

If you said enamel, flash a big old smile.

如果你选择质，那就答对了。

And your teeth aren't hard enamel all the way through.

且不是全都是质。

If you zoom way in, tooth enamel looks almost like the weave of a basket.

如果放大质，它与篮子的纹理非常相近。

Tooth enamel is the hardest substance in your body, did you know?

你知，质是人体内最坚硬的物质?

Fluoride protects us from cavities by remineralizing enamel on our teeth.

氟化物通过再矿化质来保护我们免受蛀的侵害。

The organoids happily churned out the chemical components of enamel.

类器官愉快地分泌出了质的化学成分。

Enamel is the strongest stuff in your whole body -- even stronger than bone!

质是全身最坚硬的东西，甚至比骨头还硬。

So building enamel is like making rocks in your mouth.

所以生产质就像在你嘴里生产岩石。

Even with protective enamel ridges, these teeth would gradually have worn down.

即使是有保护质的脊，这些也会逐渐被磨损。

Many foods weaken our enamel and brushing right after can actually damage your teeth.

许多食物损伤质，吃完饭后就刷，实际上也损伤。

Millions of these rods packed together make up the enamel layer of your teeth.

这些成千上万的结晶物排列堆积，形成了你的质。

The first step was to work out exactly how enamel is produced.

第一步是弄清楚质如何产生。

Frequent use of fluoride-containing mouthwashes, gels, toothpaste, and tablets will also fortify the enamel.

经常使用含氟的漱口水、凝胶、膏和药片也可以强化质。

Dentin is pretty hard, but unlike enamel, it's porous.

本质非常硬，但与质不同，它是多孔的。

For enamel, this process produces long, thin strands, each about 60 nanometers in diameter.

在生成质的过程中会产生细长的纤维状物，每条纤维的直径宽约60纳米。

This acid can cause holes, called cavities, to form in the enamel of your teeth.

这些酸会造成蛀洞，形成在质表面。