两种牙髓生物材料诱导的牙本质内钙扩散的体外研究

In vitro study of intradentinal calcium diffusion induced by two endodontic biomaterials.

作者信息

Guigand M, Vulcain J M, Dautel-Morazin A, Bonnaure-Mallet M

机构信息

Department of Endodontics, Faculty of Dentistry, University of Rennes-France.

出版信息

J Endod. 1997 Jun;23(6):387-90. doi: 10.1016/S0099-2399(97)80189-6.

DOI:10.1016/S0099-2399(97)80189-6

PMID:9545949

Abstract

The aim of this in vitro study was to assess intratubular calcium penetration induced by two root canal restoration materials, one calcium oxide based, and the other calcium hydroxide based. Pig teeth were restored with no preliminary root canal preparation. The filing materials were left in place for 8, 15, or 21 days. The samples were then examined using various microanalytical techniques and, in parallel, by backscattered electron image (BEI) scanning electron microscopy. The Ca/P ratios obtained by microanalysis were higher for samples restored with calcium oxide. In addition, the distances over which the ratios increased were also greater than those obtained using calcium hydroxide. BEI photographs confirm these results and show corresponding retrodiffusion fringes.

摘要

本体外研究的目的是评估两种根管修复材料诱导的管内钙渗透情况，一种是基于氧化钙的，另一种是基于氢氧化钙的。猪牙未进行初步根管预备就进行了修复。将填充材料放置8天、15天或21天。然后使用各种微分析技术对样本进行检查，并同时通过背散射电子图像（BEI）扫描电子显微镜进行检查。通过微分析获得的氧化钙修复样本的Ca/P比更高。此外，该比值增加的距离也比使用氢氧化钙获得的距离更大。BEI照片证实了这些结果，并显示出相应的逆向扩散条纹。