n.象牙质（的东西），牙本质

The tooth's structure is composed of three layers: enamel, dentin, and pulp.
牙齿的结构由三层组成：牙釉质、牙本质和牙髓。
In cases of tooth sensitivity, the dentin may be exposed, leading to discomfort when consuming hot or cold foods.
在牙齿敏感的情况下，牙本质可能会暴露出来，导致食用热或冷食物时感到不适。
The dentist used a dental drill to remove the decayed dentin from the tooth.
牙医使用牙钻从牙齿上移除腐烂的牙本质。
A root canal treatment involves removing the infected pulp and dentin from inside the tooth.
根管治疗涉及去除牙齿内部的感染组织和牙本质。
The composite filling was placed directly into the cavity after the removal of the damaged dentin.
在去除受损的牙本质后，直接将复合填充物放置在洞中。
The dentin contains microscopic tubules that transmit sensations like pain or temperature changes to the pulp.
牙本质包含微小的管状结构，这些管状结构将疼痛或温度变化等感觉传递给牙髓。
The process of tooth discoloration often begins with the exposure of the dentin layer due to enamel wear.
牙齿变色的过程通常始于牙釉质磨损导致牙本质层暴露。
The application of fluoride can help remineralize the dentin and protect against further decay.
氟化物的应用有助于重新矿化牙本质，并防止进一步腐蚀。
The dentist recommended a crown to cover the weakened dentin and prevent any further damage to the tooth.
牙医建议安装牙冠来覆盖受损的牙本质，防止对牙齿造成进一步损害。
The study found that the new toothpaste formulation effectively reduced dentin erosion caused by acidic beverages.
研究发现，这种新型牙膏配方能有效减少酸性饮料引起的牙本质侵蚀。