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Efficacy of ultrasonic activation of NaOCl and orange oil in removing filling material from mesial canals of mandibular molars with and without isthmus

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Efficacy of ultrasonic activation of NaOCl and orange oil in removing filling material from mesial canals of mandibular molars with and without isthmus

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Título Efficacy of ultrasonic activation of NaOCl and orange oil in removing filling material from mesial canals of mandibular molars with and without isthmus
Autor Barreto, Mirela Sangoi
Rosa, Ricardo Abreu da
Santini, Manuela Favarin
Cavenago, Bruno Cavalini
Duarte, Marco Antonio Húngaro
Bier, Carlos Alexandre Souza
Só, Marcus Vinicius Reis
Abstract Objectives: The aim of this study was to evaluate the volume of remaining filling material after passive ultrasonic irrigation (PUI) of sodium hypochlorite (NaOCl) and orange oil mesial canals of mandibular molars, with and without isthmus. Material and Methods: Thirty mesial roots of mandibular molars were divided according to the presence or absence of isthmus. Canals were prepared and filled (Micro-CT#1). Filling was removed using rotary instruments, and specimens were sub-divided into three groups according to the irrigationprocedures: Conventional - conventional irrigation with NaOCl, PUI/NaOCl - PUI of NaOCl (three activations, 20 seconds each), and PUI/orange oil - PUI of orange oil (Micro-CT#2). Specimens were enlarged using the X2 and 3X ProTaper Next instruments and submitted to the same irrigation protocols (Micro-CT#3). Results: No differences were found between the experimental groups in each stage of assessment (P>0.05). The volume of residual filling material was similar to those in Micro-CT#2 and Micro-CT#3, but lower than those observed in Micro-CT#1 (P<0.05). When groups were pooled according to the presence or absence of an isthmus, volume of residual filling material was higher in specimens presenting isthmus (P<0.05). Conclusions: PUI of NaOCl or orange oil did not improve filling removal. Isthmus consists in an anatomical obstacle that impairs the removal of filling material.
Contido em Journal of applied oral science. Bauru. Vol. 24, no. 1 (Jan./Feb. 2016), p. 37-44
Assunto Canais radiculares : Tratamento
Endodontia
Tomografia computadorizada
[en] Endodontics
[en] Micro-computed tomography
[en] Retreatment
[en] Ultrasonics
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/147373
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