Pashley D H, Kepler E E, Williams E C, O'Meara J A
Arch Oral Biol. 1984;29(1):65-8. doi: 10.1016/0003-9969(84)90044-x.
Cavities were prepared into the dentine of mandibular first molars of anaesthetized dogs. Conical plastic chambers were cemented into the cavities to permit quantitation of dentine permeability using a fluid-filtration technique. There was a progressive fall in dentine permeability every hour for the 6 h of study, to about 20 per cent of zero time values. The fall in dentine permeability could be delayed but not prevented, by filtering fluid across the dentine into the pulp. Similar experiments on teeth from which the pulps had been removed showed no change or a slight increase in permeability with time. No change in dentine permeability was seen in dogs killed after the zero time measurement and followed for an extra 6 h. This decrease of dentine permeability in response to cavity preparations only occurs in teeth with intact pulps.
在麻醉犬的下颌第一磨牙牙本质上制备洞形。将圆锥形塑料小室粘固于洞中，以便采用液体滤过技术对牙本质通透性进行定量测定。在研究的6小时内，牙本质通透性每小时都逐渐下降，降至零时值的约20%。通过将液体滤过牙本质进入牙髓，牙本质通透性的下降可被延迟，但不能被阻止。对已去除牙髓的牙齿进行的类似实验显示，通透性随时间无变化或略有增加。在零时测量后处死并额外观察6小时的犬中，未观察到牙本质通透性有变化。这种仅因制备洞形而导致的牙本质通透性降低仅发生在牙髓完整的牙齿中。
