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牙齿在现存人类身体的各个部位中几乎是最没有生命力,牙齿的新陈代谢以及康复和再生的机能几乎是零,就像无生命力的木头那样,消极地甘受腐蚀,唯一能够意识到的是感觉疼痛。更麻烦的是牙疼并不预示牙齿受到的损害,牙疼只是由于牙质内小细管中流动的液体无缘无故的刺激造成的。因为热、冷、干燥或者糖脂食品的渗透压力都能产生疼痛而牙齿损坏却不会引起疼痛。戴达罗斯认为所有的人都有理由为此焦虑。
Teeth are nearly the least viable in all parts of the existing human body. The metabolism of the teeth and the function of recovery and regeneration are almost zero. Like the inanimate wood, the tooth is passively eroded and the only thing that can be perceived is pain. More troublesome is that toothache does not foreshadow tooth damage, toothache is only caused by unintended stimulation of the fluid flowing in the dentinal tubules. Because hot, cold, dry or glycolipid food can cause pressure and osmotic pressure damage to the teeth will not cause pain. Daedalus thinks everyone has reason to be anxious.