Hayashi Y
Department of Conservative Dentistry, Faculty of Dentistry, Kyushu University, Fukuoka, Japan.
J Electron Microsc (Tokyo). 1995 Oct;44(5):384-9.
The large mineral deposits at the macroscopically occluded fissure was investigated using a high-resolution electron microscope. The large polygonal crystals at the bottom third of the fissure consisting of single crystals were mainly whitlockite. The contact between the large crystals was formed in some interfaces where the incoherent tilt boundary was formed. The plate-like crystals at the middle third of the fissure corresponded with whitlockite and consisted of the aggregation of small crystallites positioned in different directions at the appositional levels, where the lattice fringes were distorted. These findings suggested that two types of large crystals provide a structure which is favorable for natural occlusion to occur at the intact fissure.
利用高分辨率电子显微镜对宏观封闭裂隙处的大型矿床进行了研究。裂隙底部三分之一处由单晶组成的大型多边形晶体主要是白磷钙矿。在一些形成非相干倾斜边界的界面处形成了大晶体之间的接触。裂隙中间三分之一处的板状晶体与白磷钙矿相对应，由在并置水平上沿不同方向排列的小晶粒聚集体组成，晶格条纹在此处发生扭曲。这些发现表明，两种类型的大晶体提供了一种结构，有利于在完整的裂隙处发生自然封闭。
