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Iranian Endodontic Journal، جلد ۱۰، شماره ۴، صفحات ۲۳۶-۲۳۹
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عنوان انگلیسی Scanning Electron Microscopic Evaluation of Residual Smear Layer Following Preparation of Curved Root Canals Using Hand Instrumentation or Two Engine-Driven Systems
چکیده انگلیسی مقاله Introduction: In this experimental study, the amount of smear layer (SL) remnants in curved root canals after chemomechanical instrumentation with two engine-driven systems or hand instrumentation was evaluated. Methods and Materials: Forty-eight mesiobuccal roots of mandibular first molars with curvatures ranging between 25 and 35 degrees (according to Schneider’s method) were divided into three groups ( n =16) which were prepared by either the ProTaper Universal file series, Reciproc single file system or hand instrumentation. The canals were intermittently irrigated with 5.25% NaOCl and 17% (ethylenediaminetetraacetic acid) EDTA, followed by distilled water as the final rinse. The roots were split longitudinally and the apical third of the specimens were evaluated under 2500× magnification with a scanning electron microscope (SEM). The mean scores of the SL were calculated and analyzed using the non-parametric Kruskal-Wallis and Mann-Whitney U tests. Results: The mean scores of the SL were 2.00±0.73, 1.94±0.68 and 1.44±0.63 µm for the ProTaper Universal, Reciproc and hand instrumentation, respectively. Mean score of SL was significantly less in the hand instrumentation group than the ProTaper ( P =0.027) and Reciproc ( P =0.035) groups. The difference between the two engine-driven systems, however, was not significant ( P =0.803). Conclusion: The amount of smear layer in the apical third of curved root canals prepared with both engine-driven systems was similar and greater than the hand instrumentation technique. Complete cleanliness was not attained.
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نویسندگان مقاله عباسعلی خادمی | abbasali khademi


مسعود ساعتچی | masoud saatchi


محمد مهدی شکوهی | mohammad mehdi shokouhi


بدری بقایی | badri baghaei


نشانی اینترنتی http://journals.sbmu.ac.ir/iej/article/view/9111
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زبان مقاله منتشر شده en
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نوع مقاله منتشر شده Original Article
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