MICROCRYSTALLINE STRUCTURE STUDY DEMINERALIZATION AND REMINERALIZATION OF THE ARTIFICIAL CARIES OF HUMAN TOOTH ENAMEL

作     者：张伟国 刘瑷如 温树林 冯景伟 Zhang Weiguo Liu Airu Department of Oral Pathology, School of Stomatology, SSMU, Shanghai Wen Shulin Feng Jingwei Laboratory of Structure Analysis, Shanghai Institute of Ceramics, Academia Sinica, Shanghai

作者机构：Department of Oral Pathology School of Stomatology SSMU Shanghai Laboratory of Structure Analysis Shanghai Institute of Ceramics Academia Sinica Shanghai 

出 版 物：《Medical Bulletin of Shanghai Jiaotong University》 (上海交通大学学报（医学英文版）)

年 卷 期：1991年第14卷第2期

页      面：17-21页

学科分类：10[医学] 

主　　题：dental enamel caries pathology ultrastructure crystals high-resolution electron microscopy 

摘      要：Microcrystalline structure changes of teeth enamel crystals during the artificial caries and synthetic saliva reminerlization were reported. Enamel samples were thinned by argon-ion-milling and examined by high-resolution transmitting electron microscope. The results revealed that the lattice dissolution of enamel hydroxyapatite started from central parts and grain boundaries of crystals, the former were often parallel to (1010) plane and advancing along the [0001] zone axis of crystals. The results also shown that synthetic saliva may reduce the quantity of bright contrast spots in lattice image for artificial carious crystals. In addition, some defects such as dislocations were found in grains, and they are believed to be related to the dissolution of lattice. Three kinds of structural weak sites revealed in crystals, i. e. (1)dislocations, (2) vacancies or impurities, and (3) grain boundaries.