dentin編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看dentindentin — 名詞名詞1. hard tissue beneath enamel forming the main part of a tooth1.名詞釋義牙本質hard tissue beneath enamel forming the main part of a tooth例句Cavities can reach the dentin if left untreated.