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ORIGINAL ARTICLE
Year : 2015  |  Volume : 5  |  Issue : 1  |  Page : 26-32

Evaluation of the effect of duration of application of Smear Clear in removing intracanal smear layer: SEM study


1 Department of Restorative Dentistry and Endodontics, IBN Sina National College for Medical Studies, Jeddah, Saudi Arabia
2 Department of Restorative Dentistry and Endodontics, 1Karnataka Lingayat Education Viswanath Katti Institute of Dental Sciences, Belgaum, Karnataka, India

Correspondence Address:
Ankur Dua
Department of Restorative Dentistry and Endodontics, IBN Sina National College for Medical Studies, P.O. Box 31906, Jeddah 21418
Saudi Arabia
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/1658-5984.149083

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Aim: To evaluate the effect of duration of application of 17% ethylene diamine tetraacetic acid (EDTA) and SmearClear on the removal of intracanal smear layer by SEM. Materials and Methods: Seventy-two extracted maxillary incisors were root canal instrumented and randomly distributed into three groups of 24 teeth each according to different final irrigation regimens, Group A-17% EDTA + 1% sodium hypochlorite (NaOCl), Group B-SmearClear + 1% NaOCl, Group C (Control group)-Distilled water + 1% NaOCl. Further each group was subdivided into 3 subgroups according to the duration of application of the irrigating solutions for 1, 3 and 5 minutes. Following de-coronation and splitting of roots, one-half of each root was examined under scanning electron microscope (SEM) at 1000Χ magnification for smear layer at 6 mm and 2 mm levels. Data were subjected to statistical analysis using Kruskal-Wallis and Mann-Whitney U test (P < 0.05) Results: At 6 mm level, the mean smear scores were similar with both 17% EDTA solution and Smear Clear, however, at 2 mm level, they were significantly lower with Smear Clear (P < 0.05). The smear scores decreased as the duration of application of either 17% EDTA or Smear Clear increased from 1 to 5 minutes. Conclusion: Final irrigation with either 17% EDTA solution or Smear Clear followed by 1% NaOCl was effective in removing the smear layer for all three durations of applications. But, in the apical third, Smear Clear was more effective when compared with 17% EDTA solution.


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