Calcium content increases gradually from outer zone to inner zone in dentin.
牙本质从外层到内层钙含量逐渐升高；
The outer zone is made up of reticular cells, columnar cells and mucous cells;
外区主要由网状上皮细胞、柱状上皮细胞、黏液细胞组成；
The outer zone is made up of reticular cells, columnar cells and mucous cells;
外区主要由网状上皮细胞、柱状上皮细胞、黏液细胞组成；
应用推荐