牙本质(dentin),也称为齿质象牙质,是构成牙齿主体的微黄色组织,介于牙釉质牙髓之间。牙本质的组成70%为无机物(主要为),20%为有机物,10%为水分。硬度低于牙釉质,高于牙骨质英语cementum

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臼齿的矢状断面;1:牙冠,2:牙根,3:牙釉质,4:牙本质(齿质)和牙本质小管,5:髓室,6:血管和神经,7:牙周韧带,8:牙根尖和根尖周区,9:牙槽骨

和牙釉质不同的是,它终身都会继续不断地生长,因此当有蛀洞产生会自行长出新的牙本质修复[1]

牙本质内外贯穿牙本质小管。

参考资料

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