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J Conserv Dent. 2018 Jan-Feb;21(1):90-94. doi: 10.4103/JCD.JCD_127_17.

Scanning electron microscopic evaluation of marginal adaptation of AH-Plus, GuttaFlow, and RealSeal at apical one-third of root canals - Part II: Core-sealer interface.

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Department of Conservative Dentistry and Endodontics, Dr. R. Ahmed Dental College and Hospital, Kolkata, West Bengal, India.



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 in vitro 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.

Materials and Methods:

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.

Statistical Analysis Used:

Analysis of variance and post hoc Tukey's test.


Mean average gap was significantly higher (P < 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 (P > 0.05).


GuttaFlow is better adapted in the apical third of root canals among 3 sealers.


AH-Plus; GuttaFlow; RealSeal; core-sealer interface; marginal adaptation; scanning electron microscope

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