Adhikari Haridas Das, Jain Sakshi
Department of Conservative Dentistry and Endodontics, Dr. R. Ahmed Dental College and Hospital, Kolkata, West Bengal, India.
J Conserv Dent. 2018 Jan-Feb;21(1):90-94. doi: 10.4103/JCD.JCD_127_17.
Not only the gaps at dentin-sealer interface but also at core-sealer interface may jeopardize the outcome of root canal treatment.
The aim of this scanning electron microscopic (SEM) study was to determine which root canal sealer among AH-Plus, GuttaFlow, and RealSeal provides a superior marginal adaptation with the core obturating material in the apical third region of root canals.
Selected 30 human freshly extracted maxillary central incisors were biomechanically prepared, then divided equally into three groups and obturated with AH-Plus, GuttaFlow, and RealSeal using single cone obturation technique. After sectioning longitudinally, apical third of the roots were observed under SEM dentin-sealer-core interface was focused. Marginal adaptation and interfacial gaps at core-sealer interface of all the samples were evaluated and analyzed statistically in this part of the article.
Analysis of variance and Tukey's test.
Mean average gap was significantly higher ( < 0.05) for AH-Plus (15.65 ± 10.48 μm), when compared to GuttaFlow (3.51 ± 1.81 μm) and RealSeal (6.01 ± 2.51 μm). Between RealSeal and GuttaFlow, the latter showed least marginal gap; however, this difference was not statistically significant ( > 0.05).
GuttaFlow is better adapted in the apical third of root canals among 3 sealers.
牙本质封闭剂界面以及桩核封闭剂界面的缝隙均可能危及根管治疗的效果。
本扫描电子显微镜（SEM）研究的目的是确定AH-Plus、GuttaFlow和RealSeal这三种根管封闭剂中，哪一种与根管根尖三分之一区域的桩核充填材料具有更好的边缘适应性。
选取30颗新鲜拔除的人类上颌中切牙进行生物力学预备，然后平均分为三组，采用单锥充填技术分别用AH-Plus、GuttaFlow和RealSeal进行充填。纵向切片后，在SEM下观察牙根的根尖三分之一区域，重点观察牙本质-封闭剂-桩核界面。在本文这一部分，对所有样本桩核封闭剂界面的边缘适应性和界面缝隙进行评估并进行统计学分析。
方差分析和Tukey检验。
与GuttaFlow（3.51±1.81μm）和RealSeal（6.01±2.51μm）相比，AH-Plus的平均缝隙显著更高（<0.05）（15.65±10.48μm）。在RealSeal和GuttaFlow之间，后者的边缘缝隙最小；然而，这种差异无统计学意义（>0.05）。
在三种封闭剂中，GuttaFlow在根管根尖三分之一区域的适应性更好。
