Radiographic and scanning electron microscopic assessment of root canal filling remnants after endodontic re-instrumentation

Authors

  • Luciane Geanini Pena Santos Department of Dentistry – Federal University of Santa Catarina – Florianopolis – SC – Brazil. http://orcid.org/0000-0003-0531-0828
  • Wilson Tadeu Felippe Department of Dentistry – Federal University of Santa Catarina – Florianopolis – SC – Brazil.
  • Beatriz Dulcineia Mendes Souza Department of Dentistry – Federal University of Santa Catarina – Florianopolis – SC – Brazil.
  • Andrea Cristina Konrath Department of Informatics and Statistics – Federal University of Santa Catarina – Florianopolis – SC – Brazil.
  • Mabel Mariela Rodríguez Cordeiro Department of Morphological Sciences – Federal University of Santa Catarina – Florianopolis – Santa Catarina – Brazil.
  • Mara Cristina Santos Felippe Department of Morphological Sciences – Federal University of Santa Catarina – Florianopolis – Santa Catarina – Brazil.

DOI:

https://doi.org/10.14295/bds.2017.v20i1.1325

Abstract

Objective: Failures in endodontic treatment may occur by several reasons. Endodontic retreatment is an interesting alternative to manage this clinical problem. However, it is not possible to completely remove the root canal filling by any current retreatment technique. The aim of this study was to evaluate the presence of residual root canal filling materials after endodontic re-instrumentation. Material and Methods: Sixty extracted anterior human teeth were prepared by step-back technique with Flexofiles, K-files and Gates-Glidden (GG) burs. Between the use of each file or bur, root canals were irrigated with sodium hypochlorite (NaOCl). Smear layer was removed by irrigation with ethylenediaminetetraacetic acid and NaOCl. After drying with paper points the root canals were randomly divided into 5 groups (n = 12), according to filling material: Resilon cones/Real Seal sealer or gutta-percha cones and Endofill, Sealapex, AH Plus or MTA Fillapex sealers. After one week, root canal fillings were removed using Eucaliptol and K-files. Root canals were re-instrumented with K-files and GG burs sized larger than the first ones. The removal of root canal filling material was analyzed by radiography and scanning electron microscopy (SEM). Statistical analysis was performed using Binary Logistic Regression test (P < 0.05). Results: Radiographic and SEM analysis showed that material from the MTA Fillapex group was better removed than that from Endofill, Sealapex, AH Plus and Real Seal groups. Conclusion: After re-instrumentation, MTA Fillapex group showed less remnants into the root canals than Endofill, Sealapex, AH Plus and Real Seal groups. Residual material was most often found in the apical third.

Keywords

Dental radiography; Endodontic retreatment; Root canal filling materials; Scanning electron microscopy.

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Published

2017-03-23

Issue

Vol. 20 No. 1 (2017): Jan. - Mar. / 2017 - Published February 2017

Section

Clinical or Laboratorial Research

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All manuscript's copyright ownership of the article "____________________________________________________________________" is transferred from the author(s) to the BRAZILIAN DENTAL SCIENCE, in the event the work is published. The manuscript has not been published elsewhere and that it has not been submitted simultaneously for publication elsewhere.

We hereby attest the study is original and does not present manipulated data, fraud or plagiarism. We made significant scientific contribution to the study and we are aware of the presented data and in agreement with the final version of the manuscript. We assume complete responsibility for the ethical aspects of the study.

 

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