牙本质龋中化学成分的电子探针微区分析  

Spatial chemical analysis of the dentin caries with electron probe microanalysis technique(EPMA)

作　　者：简晓岚[1] 杨婧[2] 赵玮[2] 

机构地区：[1]广州医科大学第三附属医院口腔科,广东广州510150 [2]中山大学光华口腔医学院附属口腔医院儿童口腔科.广东省口腔医学重点实验室,广东广州510055

出　　处：《临床口腔医学杂志》2014年第8期474-476,共3页Journal of Clinical Stomatology

基　　金：广东省科技计划项目(2010B050700004);广东省自然科学基金(8151008901000076)

摘　　要：目的:检测牙本质龋中化学成分的空间分布。方法:应用电子探针微区分析(EPMA)技术对牙本质龋中化学成分的空间分布进行检测。结果:牙本质龋中除含有主要的Ca、P、O元素外,尚含有Mg、Cl、Na、Al等微量元素;定点分析及面扫描分析显示,所形成的牙本质裂隙内Mg原子百分比、Mg/Ca摩尔比及Mg浓度均高于裂隙外,而其它微量元素含量在裂隙内、外无明显差异。结论:Mg是牙本质龋病变中优先丢失的成分之一,可能参与牙本质龋的脱矿和再矿化过程。Objective：To investigate the spatial distribution of the compositional elements in dentin caries.Method：The spatial distribution of the compositional elements in dentin caries was detected with electron probe microanalysis technique （EPMA）.Result：Several minor elements （Mg,C1,Na,C1） were present in dentin caries,besides the major elements （Ca,P,O）.Selected spot and map analyses of EPMA showed that the higer Mg atom percent,Mg / Ca moler ratio and Mg concentrations were found in the formed cracks of the dentin caries than outside,whereas there was no difference in other minor elements.Conclusion：Mg is one of the important minor elements which is preferentially lost in the dentin caries and might contribute to the demineralization and remineralization procedure of the dentin.

关 键 词：牙本质 龋病 化学成分 电子探针 

分 类 号：R781.1[医药卫生—口腔医学]