口腔医学研究

口腔医学研究 ›› 2015, Vol. 31 ›› Issue (5): 506-507.

• 临床研究论著 • 上一篇    下一篇

EDTA预处理硬化牙本质前后的电镜观察

李婷婷, 孙敏敏, 康钧棠, 夏文薇*   

  1. 上海交通大学医学院附属第九人民医院牙体牙髓科;
    上海市口腔医学重点实验室 上海 200011
  • 收稿日期:2014-09-10 出版日期:2015-05-28 发布日期:2016-04-29
  • 通讯作者: 夏文薇,电话:021—23271699—5702
  • 作者简介:李婷婷(1982~ ),女,上海人,硕士研究生,主治医师,主要从事牙体牙髓病的临床治疗工作。

Observation of the Ultrastructural Changes of Sclerotic Dentin Pretreated with EDTA by SEM.

LI Ting-ting, SUN Min-min, KANG Jun-tang, et al.   

  1. Department of Endodontrcs Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai 200011
  • Received:2014-09-10 Online:2015-05-28 Published:2016-04-29

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摘要： 目的:通过扫描电镜观察硬化牙本质经乙二胺四乙酸(ethylene diamine tetraacetic acid,EDTA)预处理前后的差异,在超微结构下分析硬化牙本质的结构改变,为临床应用EDTA预处理法提供理论依据。方法:选择10颗具有硬化牙本质(视觉分类Ⅲ级及以上)的离体牙,经扫描电镜观察比较EDTA预处理前后硬化牙本质表面超微结构的变化。结果:扫描电镜所拍摄的图片显示,经EDTA预处理后硬化牙本质表面的超矿层以及接近牙本质小管开口5 μm内的钙盐沉积物全部或大部分溶解,且不破坏管口处的管周牙本质,而在牙本质小管深部,可见到较小的散在晶体。结论:EDTA能有效清除溶解牙本质小管内的矿盐沉积晶体,改善硬化牙本质的不良粘结表面,提高粘结修复的成功率。

关键词: 硬化牙本质, 乙二胺四乙酸, 扫描电镜

Abstract: Objective: To evaluate the ultrastructure changes of sclerotic dentin in non-carious cervical lesions before and after pretreated with EDTA(Ethylene Diamine Tetraacetic Acid). Methods: 10 teeth with scale Ⅲ or Ⅳ sclerotic dentin were selected. The ultrastructural changes of them before and after pretreated with EDTA were observed by SEM. Rusults: After pretreated the sclerotic dentin by EDTA, the top dentinal tubules of the calcium salt deposits were completely dissolved, and there still has residual dissolved calcium salt particle in the deep dentinal tubules. Conclusion: EDTA could improve the poor adhesion of the sclerotic dentin surface and increase the bond strength.

Key words: Sclerotic dentin, EDTA, SEM

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