CLINICAL CORRELATIONS OF DENTIN STRUCTURE AND FUNCTION
CLINICAL CORRELATIONS OF DENTIN STRUCTURE AND FUNCTION
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DOI：
10.1016/0022-3913(91)90414-r
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发表时间：
1991-12-01
影响因子：
4.6
通讯作者：
PASHLEY, DH
中科院分区：
文献类型：
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作者：
PASHLEY, DH
牙本质是一种多孔的、充满液体的矿化组织，可以为上面的牙釉质提供关键的机械支撑。 一旦牙釉质或牙骨质表面密封因疾病或创伤而丧失，提供关键机械支撑的同一组织就会成为一种负担，提供数百万个从外围直接到牙髓的充满液体的扩散通道。 如果放置在牙洞中的修复材料不能密封牙本质，则从牙洞表面边缘、修复材料和牙齿之间的间隙周围到牙本质表面，然后通过牙本质通过牙本质小管到达牙髓，就会形成一个充满液体的连续体。 在大多数情况下，这些通道允许外源性和内源性物质在牙本质上双向扩散。 有时，水动力刺激会产生短暂、快速的牙本质液运动，从而引起疼痛。 有时，牙本质深处的小管非常靠近，以至于它们的固有湿度会干扰粘合树脂的粘合。 这会导致间隙的形成、微渗漏、牙本质敏感性，有时还会刺激牙髓。 许多临床问题，如牙本质粘合不良、微渗漏、牙本质敏感性和牙髓刺激等，都与牙本质的结构和功能有关。
Dentin, a porous, fluid-filled mineralized tissue, may provide critical mechanical support to overlying enamel. Once the enamel or cementum surface seals are lost by disease or trauma, the same organization that provided critical mechanical support then becomes a liability, offering millions of fluid-filled diffusion channels from the periphery directly to the pulp. If restorative materials placed in cavities do not seal the dentin, there is a fluid-filled continuum from the cavosurface margins, around gaps between the restorative material and the tooth, to dentin surfaces, then through dentin via its tubules to the pulp. Under most conditions these channels permit bidirectional diffusion of exogenous and endogenous substances across dentin. Occasionally, hydrodynamic stimuli will produce transient, rapid movement of dentinal fluid that will induce pain. The tubules are sometimes so close together in deep dentin that their intrinsic wetness interferes with the bonding of adhesive resins. This permits the formation of gaps, microleakage, dentin sensitivity, and, occasionally, pulpal irritation. Many clinical problems such as poor dentin bonding, microleakage, dentin sensitivity, and pulpal irritation have a common denominator in the structure and function of dentin.