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牙本質(dentin),也稱為齒質象牙質,是構成牙齒主體的微黃色組織,介於牙釉質牙髓之間。牙本質的組成70%為無機物(主要為),20%為有機物,10%為水分。硬度低於牙釉質,高於牙骨質英語cementum

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臼齒的矢狀斷面;1:牙冠,2:牙根,3:牙釉質,4:牙本質(齒質)和牙本質小管,5:髓室,6:血管和神經,7:牙周韌帶,8:牙根尖和根尖周區,9:牙槽骨

和牙釉質不同的是,它終身都會繼續不斷地生長,因此當有蛀洞產生會自行長出新的牙本質修復[1]

牙本質內外貫穿牙本質小管。

參考資料

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