Table of Contents
International Scholarly Research Notices
Volume 2014 (2014), Article ID 289164, 5 pages
Research Article

Efficacy of Two Irrigants Used with Self-Adjusting File System on Smear Layer: A Scanning Electron Microscopy Study

1Department of Endodontics, Faculty of Dentistry, Yüzüncü Yıl University, 65080 Van, Turkey
2Department of Endodontics, Faculty of Dentistry, Dicle University, 21280 Diyarbakır, Turkey
3Department of Endodontics, Faculty of Dentistry, Erciyes University, 38039 Kayseri, Turkey
4Department of Endodontics, Faculty of Dentistry, Gazi University, 06510 Ankara, Turkey

Received 5 June 2014; Revised 3 July 2014; Accepted 7 July 2014; Published 23 September 2014

Academic Editor: Patricia Pereira

Copyright © 2014 Özgür Genç Şen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Mechanical instrumentation of root canals produces a smear layer that adversely affects the root canal seal. The aim of this study was to evaluate efficacy of MTAD and citric acid solutions used with self-adjusting file (SAF) system on smear layer. Twenty-three single-rooted human teeth were used for the study. Canals were instrumented manually up to a number 20 K file size. SAF was used to prepare the root canals. The following groups were studied: Group 1: MTAD + 5.25% NaOCl, Group 2: 20% citric acid + 5.25% NaOCl, and Group 3: Control (5.25% NaOCl). All roots were split longitudinally and subjected to scanning electron microscopy. The presence of smear layer in the coronal, middle, and apical thirds was evaluated using a five-score evaluation system. Kruskal-Wallis and Mann-Whitney U tests were used for statistical analysis. In the coronal third, Group 2 exhibited the best results and was statistically different froms the other groups . There was not a significant difference among the three thirds of groups according to in-group comparisons . The solutions used in Group 1 and 2 could effectively remove smear layer in most of the specimens. However, citric acid was more effective than MTAD in the three thirds of the canal.