mesodentine

例句：

1. 1.The tooth's structure is made up of several layers, including the outer layer, dentin, and inner layer, among others.
   牙齿的结构由外层、牙本质和内层等组成。
2. 2. During development, the mesodentine layer undergoes significant changes in thickness and composition.
   在发育过程中，中层牙本质层的厚度和成分会发生显著变化。
3. 3. His research focused on the mesodentine layer, which plays a crucial role in tooth formation.
   他的研究专注于中层牙本质层，它在牙齿形成中起着至关重要的作用。