Extrusion of Debris from Curved Root Canals Instrumented up to Different Working Lengths Using Different Reciprocating Systems

• Published in: Journal of endodontics Vol. 45; no. 7; pp. 930 - 934
• Main Authors: Mendonça de Moura, João Daniel, Bueno, Carlos Eduardo da Silveira, Fontana, Carlos Eduardo, Pelegrine, Rina Andrea
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.07.2019
• Subjects: Apical foramen; Dental Pulp Cavity; Dentistry; instrumentation; Root Canal Preparation; Tooth Apex; Tooth Root; Apical foramen; root canal preparation; instrumentation
• ISSN: 0099-2399; 1878-3554
• DOI: 10.1016/j.joen.2019.03.002

The aim of this study was to evaluate the extrusion of debris associated with the use of the Reciproc (VDW GmbH, Munich, Germany) and WaveOne Gold (Dentsply Maillefer, Ballaigues, Switzerland) reciprocating systems in curved canals instrumented up to different working lengths (WLs). Sixty mesial roots of extracted mandibular first molars with mesiobuccal canals having curvatures between 10° and 20° and independent foramina were randomly distributed into 4 experimental groups (n = 15) according to WL and the instrumentation system used: RC0, Reciproc and WL at the apical foramen; RC1, Reciproc and WL at 1 mm short of the apical foramen; WOG0, WaveOne Gold and WL at the apical foramen; and WOG1, WaveOne Gold and WL at 1 mm short of the apical foramen. The canals were irrigated with double-distilled water throughout the preparation. Each root was fit into an Eppendorf tube to collect the debris extruded through the foramen during instrumentation. After instrumentation, the roots were removed from the tubes, and the weight of the debris was obtained by subtracting the initial weight of the tubes from their final weight. The data were submitted to the analysis of variance parametric test complemented by the Tukey test. No statistically significant difference was observed between the 4 experimental groups regarding the amount of debris extruded (P > .05). The 2 reciprocating systems tested were associated with similar amounts of apically extruded debris, regardless of the working length used in the instrumentation. •Apical extrusion after using reciprocating files in curved canals.•The impact of the working length was evaluated on the apical extrusion.•Both systems tested produced equivalent amounts of apically extruded debris.•The working length had no influence on the amount of apically extruded debris.