dentino-enamel membrane

例句：

1. 1. The dentist removed the damaged tooth andreplaced it with a new one.
   牙医拔除了损坏的牙齿，并换上了一颗新的。
2. 2. Theenamel on theteeth is very thin and easilywears away.
   牙齿上的珐琅质非常薄，很容易磨损。
3. 3. The studyfound that the enamel layer ofthe teeth plays an important role in protectingthe underlying dentin.
   研究发现，牙齿表面的珐琅质层在保护下面的牙本质方面起着重要作用。