DEBRIS EXTRUSION FROM SEVERELY CURVED ROOT CANALS AFTER INSTRUMENTATION WITH WAVEONE GOLD OR ONESHAPE SINGLE FILES

Document Type : Original Article

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Department of Endodontics, Faculty of Oral and Dental Medicine, Cairo University, Egypt

Abstract

Aim: The aim of this study was to assess the effect of degree of curvature on extrusion of debris from root canals; and to compare the amount of extruded debris after instrumentation with WaveOne Gold reciprocating (WOG; Dentsply Maillefer, Ballaigues, Switzerland) and OneShape rotating (OS; MicroMega, Besançon, France) single file systems.
Materials and methods: Sixty mesiobuccal canals were assigned to 2 equal groups according to the degree of curvature, whether severe (25-40°) or moderate (10-15°) as measured using Schneider method. The canals in each group were further subdivided into 2 subgroups (n=15) according to the instrument used for preparation; WaveOne Gold (WOG) or OneShape (OS) files. The extruded debris was collected in preweighed glass vials. Data were statistically analyzed using One-way ANOVA and Tukey’s post-hoc tests.
Results: The least amounts of debris were obtained with WaveOne Gold instruments in both curvatures, with no significant difference between them (P > 0.05). Larger amounts of debris occurred with OneShape instruments in severely curved canals; but this difference was of no statistical significance. Statistically significant differences were recorded only when OneShape instruments were used in moderately curved canals.
Conclusions: Debris extrusion occurs independent of the motion or design of the instrument. However, moderate root canal curvatures allowed more extrusion of debris than severe curves. WaveOne Gold results were not affected by the degree of canal curvature; and outperformed OneShape instruments in both types of curves.

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