Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Beijing Journal of Stomatology》 2003-03
Add to Favorite Get Latest Update


LU Ruo jing et al Faculty of Stomatology,Capital University of Medical Sciences,Beijing 100050  
Objective:To compare the histology of "young" and "old" enamel and to analyze the characteristics of these enamels and their susceptibility to caries.Methods:The surface structure of human enamel was examined in the SEM and microhardness of enamel surveyed.The content of calcium and phosphorus and the ratio of Ca/P were measured.Results: The surface of newly erupted young permanent teeth was rough and porous.Pits and focal holes were obvious.The microhardness of "young" and "old" human enamel was 345 81±9 09 and 366 58±19 67(Kg/mm 2) respectively.The ratios of Ca/P were 2 07±0 12 and 2 18±0 07 respectively.Conclusion: The histological charactoristics of "young" human enamel accounts for the susceptibility to caries.Measures against caries should be taken in the early stage of eruption.
【CateGory Index】: R780.2
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved