根牙本质
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root dentine sensitivity 易发生牙本质敏感症
Diaphaneity of dentine of root 根尖牙本质的透明度
·2,447,543篇论文数据，部分数据来源于NoteExpress
In the most serious cases the enamel is worn away to such an extent that the dentine (the substance that comprises the bulk of the tooth) or even the pulp (the root) of the tooth are exposed.
BBC: NEWS | Health | Bad teeth blamed on fizzy drinks
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