Moghadam Negar, Abdollahi Amir Ardalan, Aghabalayi Fakhim Hoda, Borna Zahra
Department of Endodontics, Dental School, Tabriz University of Medical Sciences, Tabriz, Iran.
Department of Endodontics, Dental School, West Azarbaijan, Urmia University of Medical Sciences, Urmia, Iran.
Iran Endod J. 2017 Spring;12(2):231-235. doi: 10.22037/iej.2017.45.
This study aimed at evaluating the sealing properties of calcium-enriched mixture (CEM) compared to mineral trioxide aggregate (MTA) as a cervical barriers in intra-coronal bleaching.
In this study, endodontic treatment was performed on 60 extracted human incisors and canines without canal calcification, caries, restorations, resorption or cracks. The teeth were then randomly divided into two experimental groups and two control groups (=15). Then, CEM cement and MTA were applied as 3-mm intra-orifice barriers in the test groups; a mixture of sodium perborate and 30% hydrogen peroxide bleaching agents were placed within the pulp chamber for one week. Dye penetration method was used to evaluate the sealing ability of agents. Statistical analysis was performed using SPSS software. The Kendall coefficient was used to evaluate inter-observer agreement. The chi-squared test was used for statistical analysis.
The results showed that the penetration rates of CEM and MTA were the same as positive control group, with no significant differences (=0.673 and =0.408, respectively). However, there was a significant difference between the negative control group and CEM and MTA groups (=0.001 for both groups). In addition, the sealing ability of MTA and CEM cement were not significantly different (=0.682).
During intra-coronal bleaching procedures CEM cement can be used as a cervical barrier with sealing properties comparable to that of MTA.
本研究旨在评估富钙混合物（CEM）与三氧化矿物凝聚体（MTA）作为冠内漂白中颈缘屏障的封闭性能。
在本研究中，对60颗无根管钙化、龋齿、修复体、吸收或裂纹的拔除的人切牙和尖牙进行根管治疗。然后将牙齿随机分为两个实验组和两个对照组（每组15颗）。然后，在测试组中使用CEM水门汀和MTA作为3毫米的根管口屏障；将过硼酸钠和30%过氧化氢漂白剂的混合物置于髓腔内一周。采用染料渗透法评估材料的封闭能力。使用SPSS软件进行统计分析。肯德尔系数用于评估观察者间的一致性。卡方检验用于统计分析。
结果显示，CEM和MTA的渗透速率与阳性对照组相同，无显著差异（分别为0.673和0.408）。然而，阴性对照组与CEM和MTA组之间存在显著差异（两组均为0.001）。此外，MTA和CEM水门汀的封闭能力无显著差异（0.682）。
在冠内漂白过程中，CEM水门汀可作为颈缘屏障使用，其封闭性能与MTA相当。
