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The Scientific World Journal
Volume 2015, Article ID 267264, 5 pages
Research Article

Apical Extrusion of Debris Produced during Continuous Rotating and Reciprocating Motion

1Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco, Avenida Gal Newton Cavalcanti 1650, Tabatinga, 54753-901 Camaragibe, PE, Brazil
2Odontologia, Unidade de Ciências Biológicas, UFCG, 58429-900 Campina Grande, PB, Brazil

Received 5 August 2015; Revised 15 September 2015; Accepted 27 September 2015

Academic Editor: Robert M. Love

Copyright © 2015 Giselle Nevares et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This study aimed to analyse and compare apical extrusion of debris in canals instrumented with systems used in reciprocating and continuous motion. Sixty mandibular premolars were randomly divided into 3 groups (): the Reciproc (REC), WaveOne (WO), and HyFlex CM (HYF) groups. One Eppendorf tube per tooth was weighed in advance on an analytical balance. The root canals were instrumented according to the manufacturer’s instructions, and standardised irrigation with 2.5% sodium hypochlorite was performed to a total volume of 9 mL. After instrumentation, the teeth were removed from the Eppendorf tubes and incubated at 37°C for 15 days to evaporate the liquid. The tubes were weighed again, and the difference between the initial and final weight was calculated to determine the weight of the debris. The data were statistically analysed using the Shapiro-Wilk, Wilcoxon, and Mann-Whitney tests (%). All systems resulted in the apical extrusion of debris. Reciproc produced significantly more debris than WaveOne (), and both systems produced a greater apical extrusion of debris than HyFlex CM (). Cross section and motion influenced the results, despite tip standardization.