NaOH表面处理前后人牙釉质和牙本质的高分辨微区衍射研究  

High-resolution X-ray microdiffraction analysis of human enamel and dentin before and after NaOH treatment

作　　者：魏蔚[1] 彭周[2] 毛靖[1] 周彬[1] 

机构地区：[1]华中科技大学同济医学院附属同济医院口腔正畸科,湖北武汉430030 [2]华中科技大学材料科学与工程学院,湖北武汉430074

出　　处：《临床口腔医学杂志》2012年第5期268-270,共3页Journal of Clinical Stomatology

基　　金：国家自然科学基金(NSFC 30870651;NSFC 30970751)

摘　　要：目的:评价去蛋白处理对牙面微观结构和晶体学性能的影响。方法:选取因正畸治疗所需拔除的健康前磨牙1颗,在流水冷却下用慢速锯沿牙长轴制备剖面。借助微区衍射分析和扫描电镜检测,比较经10%NaOH溶液在40℃水浴条件下处理2 h前后样本的变化。结果:天然牙釉质不同区域的衍射谱线之间差异明显;但化学处理后,牙釉质衍射谱线间的差异减小,且牙面粗糙度增加。结论:去蛋白处理能够有效去除牙面所含的有机成分,且对牙面有机物含量较高的区域的微结构及晶体学性能改变显著。Objective：To evaluate the microstructure and minor crystallographic changes of deproteinated dental surfaces.Method：One caries-free human premolar was bisected labiolingually along its long axis.High-resolution X-ray microdiffraction in combination with scanning electron microscopy had been applied to the section before and after 10 % NaOH treatment for two hours.Result： Relative homogeneous diffraction patterns were showed in chemical treated enamel rather than some unique peaks revealed in natural enamel.Dental surface became rougher after deproteinated procedure.Conclusion：Microstructure and crystallographic properties of dental surface are significant changed by the deprotein treatment.And the effect is more serious in dentin as it contains more organic components.

关 键 词：高分辨微区衍射分析 扫描电镜 牙釉质 牙本质 

分 类 号：R322.4[医药卫生—人体解剖和组织胚胎学]