The effect of EDTA in 3%, 5%, 10% e 17% concentrations in the removal of the smear layer

Authors

  • Maria de Fátima Malvar Gesteira Universidade Federal da Bahia
  • Silvio José Albergaria da Silva Universidade Federal da Bahia
  • Roberto Paulo Correa de Araújo Universidade Federal da Bahia
  • Henrique Lenzi FIOCRUZ
  • Susana Carla Pires Sampaio de Oliveira Universidade Federal da Bahia

DOI:

https://doi.org/10.9771/cmbio.v9i1.4641

Keywords:

EDTA – Smear layer – Root canals – Preparation

Abstract

The success of microbial disinfection of the endodontic space depends on the endodontic instruments, the ancillary chemicalsselected and the technical skills used in the chemical-mechanical preparation. Upon completion of the instrumentation thedeposition on the dentine surface of an organic and inorganic material extract of amorphous aspect, with an irregular andgranular surface known as residual layer, was observed. Aiming at removal of this layer several chemicals, in differentconcentrations and applied in pre-established time intervals were used alone, conjugated or mixed. The objective of this studywas to analyze, in vitro, through scanning electron microscopy, the effect of EDTA in 3%, 5%, 10% and 17% concentrations onthe removal of the residual layer and cleaning of the dentine tubules through applications ranging from 1 to 3 minutes. Eightunits from an 80-tooth sample were randomly selected to compose the negative control set (GC1) and other 8 units to composethe positive control set (GC2). The remaining 64 composed the 8 experimental sets (GExp.). Analysis of the photomicrographsat magnitude 2000X revealed that the 10 % and 17 % EDTA solutions were the most effective irrespective of the pre-establishedapplication times. It was also observed that the apical third showed a lower degree of cleaning than the cervical and basalthirds.

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Published

2010-10-27

How to Cite

Gesteira, M. de F. M., Silva, S. J. A. da, Araújo, R. P. C. de, Lenzi, H., & Oliveira, S. C. P. S. de. (2010). The effect of EDTA in 3%, 5%, 10% e 17% concentrations in the removal of the smear layer. Journal of Medical and Biological Sciences, 9(1), 54–63. https://doi.org/10.9771/cmbio.v9i1.4641

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