Tooth essence makes the principal part of tooth body, be located in enamel and tooth osseous lining, not as hard as enamel, there is one cavity to call dental pulp tune inside its.

• 牙本质构成牙体的主体，位于牙釉质与牙骨质的内层，不如牙釉质坚硬，在其内有一空腔称为牙髓腔。