The dentino-enamel junction is a broad transitional zone uniting dissimilar bioceramic composites
The dentino-enamel junction is a broad transitional zone uniting dissimilar bioceramic composites
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DOI：
10.1111/j.1151-2916.2000.tb01181.x
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发表时间：
2000-01-01
影响因子：
3.9
通讯作者：
Snead, ML
中科院分区：
文献类型：
--
作者：
White, SN;Paine, ML;Snead, ML
牙本质-釉质连接（DEJ）将釉质的硬的、脆的、刚性的层耦合到下面的柔性和弹性牙本质。先前的显微图像显示釉质和牙本质之间的突然分界;然而，关于蛋白质表达的新数据表明渐变过渡。在这项研究中，维氏显微压痕揭示了一个渐变的硬度与广泛的过渡区整个DEJ区域。因此，DEJ必须被视为两个相互作用的组织之间的一个广泛的过渡区域，而不是作为一个离散的界面。该区域可以减少应力集中，并在机械和结构不同的组织之间充当重要的增韧机制。
The dentino-enamel junction (DEJ) couples a hard, brittle, stiff layer of enamel to underlying flexible and resilient dentin, Prior microscopic images have shown an abrupt demarcation between enamel and dentin; however, new data on protein expression suggests a graded transition. In this study, Vickers microindentations reveal a gradation in hardness with a wide transitional zone across the DEJ region. Therefore, the DEJ must be regarded as a broad transitional region between two interacting tissues, not as a discrete interface. This zone may reduce stress concentrations and act as an important toughening mechanism between mechanically and structurally dissimilar tissues.