Zarenejad Nafiseh, Asgary Saeed, Ramazani Nahid, Haghshenas Mohammad Reza, Rafiei Alireza, Ramazani Mohsen
Department of Restorative Dentistry, Sari Dental School, Mazandaran University of Medical Sciences, Sari, Iran.
Iranian Center for Endodontic Research, Dental Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Dent Res J (Isfahan). 2015 Nov-Dec;12(6):581-8. doi: 10.4103/1735-3327.170582.
This study was designed to assess the microleakage of glass-ionomer (GI), mineral trioxide aggregate (MTA), and calcium-enriched mixture (CEM) cement as coronal orifice barrier during walking bleaching.
In this experimental study, endodontic treatment was done for 70 extracted human incisors without canal calcification, caries, restoration, resorption, or cracks. The teeth were then divided into three experimental using "Simple randomization allocation" (n = 20) and two control groups (n = 5). The three cements were applied as 3-mm intra-orifice barrier in test groups, and bleaching process was then conducted using a mixture of sodium perborate powder and distilled water, for 9 days. For leakage evaluation, bovine serum albumin marker was traced in a dual-chamber technique with Bradford indicator. The Kruskal-Wallis and Mann-Whitney tests were used for statistical analysis.
The mean ± standard deviation leakage of samples from negative control, positive control, GI, MTA, and CEM cement groups were 0.0, 8.9 ± 0.03, 0.47 ± 0.02, 0.48 ± 0.02, and 0.49 ± 0.02 mg/mL, respectively. Statistical analysis showed no significant difference between three experimental groups (P > 0.05).
It is concluded that GI, MTA, and CEM cements are considered as suitable intra-orifice barrier to provide coronal seal during walking bleaching.
本研究旨在评估玻璃离子水门汀（GI）、三氧化矿物凝聚体（MTA）和富钙混合物（CEM）水门汀作为行走漂白期间冠部开口屏障的微渗漏情况。
在本实验研究中，对70颗无根管钙化、龋齿、修复体、吸收或裂纹的拔除的人切牙进行根管治疗。然后使用“简单随机分配”将牙齿分为三个实验组（n = 20）和两个对照组（n = 5）。在测试组中，将三种水门汀作为3毫米的孔内屏障应用，然后使用过硼酸钠粉末和蒸馏水的混合物进行9天的漂白过程。为了评估渗漏情况，采用双室技术和考马斯亮蓝指示剂追踪牛血清白蛋白标记物。使用Kruskal-Wallis检验和Mann-Whitney检验进行统计分析。
阴性对照组、阳性对照组、GI水门汀组、MTA水门汀组和CEM水门汀组样品的平均±标准差渗漏量分别为0.0、8.9±0.03、0.47±0.02、0.48±0.02和0.49±0.02mg/mL。统计分析表明，三个实验组之间无显著差异（P>0.05）。
得出结论，GI水门汀、MTA水门汀和CEM水门汀被认为是在行走漂白期间提供冠部封闭的合适孔内屏障。
