As they form teeth, odontoblasts move inward, while ameloblasts move out and slough off when they hit the surface.

形成牙齿时，成牙本质细胞向牙内部扩散，成釉细胞则向牙的外部生长，并牙齿表面时脱落。

This amazing structure is created by two types of cells: ameloblasts that secrete enamel and odontoblasts that secrete dentin.

泌牙釉的成釉细胞泌牙本质的成牙本质细胞。

Odontoblasts use a more complex process, but unlike ameloblasts, they stick around, continuing to secrete dentin throughout your life.

成牙本质细胞则需要更复杂的过程，但与成釉细胞不同，它们不会消失，会我们有生之年继续泌牙本质。

The outer wall of the pulp, contains odontoblasts which are cells that secrete a bonelike substance called dentin, which is filled with protein and minerals.

牙髓外层有成牙质细胞，它们可泌一种叫牙本质的骨样组织，其中充满了蛋白质和矿物质。

The odontoblasts have long processes, or arms, that lay within tiny tubules in the dentin - like an octopus sticking it’s arms through a block of cement.

成牙质细胞有长长的突起，或者说长臂，伸入牙本质中的小管，就像章鱼的触角伸进水泥块被困住一样。