Ashraf Hengameh, Najafi Farhood, Heidari Soolmaz, Mohammadian Manijeh, Zadsirjan Saeede
Department of Endodontics, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Department of Resin and Adhesives, Institute for Color Science and Technology, Tehran, Iran.
Iran Endod J. 2017 Spring;12(2):149-156. doi: 10.22037/iej.2017.30.
The aim of this study was to evaluate the setting time, flow, film thickness, solubility, radiopacity and characterization analysis of three epoxy resin based sealers including two experimental sealers and AH-26.
Five samples of each material were evaluated for setting time, flow, film thickness, solubility and radiopacity according to ISO 6876 Standard. Characterization of sealers was performed under the scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy, X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. Statistical evaluation was performed using the Kruskal-Wallis test.
In this study, AH-26 showed more radiopacity and flow compared to two other experimental sealers (<0.05). However, both sealers had lower setting time than AH-26 (<0.05). No statistical differences were found regarding film thickness, solubility and radiopacity (>0.05). The characterization analysis exhibited relatively similar microstructure of AH-26 sealer to the experimental root canal sealers.
According to the result of this study, all tested root canal sealers had acceptable properties based on ISO 6876 standard criteria.
本研究旨在评估三种基于环氧树脂的封闭剂的凝固时间、流动性、薄膜厚度、溶解性、射线不透性及特性分析，其中包括两种实验性封闭剂和AH - 26。
根据ISO 6876标准，对每种材料的五个样本进行凝固时间、流动性、薄膜厚度、溶解性和射线不透性评估。在扫描电子显微镜（SEM）、X射线能量色散光谱、X射线衍射（XRD）和傅里叶变换红外（FTIR）光谱下对封闭剂进行特性分析。使用Kruskal - Wallis检验进行统计学评估。
在本研究中，与其他两种实验性封闭剂相比，AH - 26显示出更高的射线不透性和流动性（<0.05）。然而，两种实验性封闭剂的凝固时间均比AH - 26短（<0.05）。在薄膜厚度、溶解性和射线不透性方面未发现统计学差异（>0.05）。特性分析显示AH - 26封闭剂与实验性根管封闭剂的微观结构相对相似。
根据本研究结果，所有测试的根管封闭剂基于ISO 6876标准标准均具有可接受的性能。
