• M M Elashiry, S E Saber, and S H Elashry.
• Department of Endodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt; Department of Periodontics, Dental College of Georgia, Augusta University, Georgia, USA.
• Niger J Clin Pract. 2020 Jan 1; 23 (1): 79-83.

ObjectivesThe aim of this study was to evaluate the quantity of apically extruded debris after canal shaping with three single-file systems.Materials And MethodsSixty mesiobuccal canals of mandibular molars were divided into three experimental groups according to the used file systems-WaveOne Gold, RECIPROC Blue, and HyFlex EDM One file. Debris extruded during canal shaping were collected in preweighed vials. Each canal was irrigated with 5 mL of distilled water via a 30 G side-vented needle. The amount of the debris extruded from each canal was calculated by subtracting the preinstrumentation from postinstrumentation measurement. The preparation times were recorded. Data were analyzed using analysis of variance (ANOVA) and posthoc Tukey tests with α = 0.05.ResultsWaveOne Gold extruded the least amount of debris. Results between WaveOne Gold and HyFlex EDM were significantly different. No significant differences in canal shaping time were detected among the three groups (P > 0.05).ConclusionWaveOne Gold showed the best results regarding apical debris extrusion. Difference between WaveOne Gold and HyFlex EDM suggests that file design and motion kinematics affect the quantity of debris extrusion.

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