Ultrastructural evaluation of radicular dentin after Nd

YAG laser irradiation combined with different chemical substances

M. I A Faria, Aline Evangelista Souza-Gabriel, Melissa Marchesan, Manoel Damiao Sousa-Neto, Y. T C Silva-Sousa

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

This article sought to evaluate the dentin morphology after irradiation by a Neodymium:Yttrium-Aluminum-Garnet (Nd:YAG) laser, using different chemical substances to irrigate radicular canals: distilled water, 17% ethylenediaminetetraacetic acid plus Cetavlon (EDTAC), 1% sodium hypochlorite, and 2% Chlorhexidine. Groups were subdivided according to the protocol of laser application (n = 9). The specimens were analyzed by scanning electron microscopy (SEM). No differences were found in dentin morphology when different root thirds were examined. Regardless of the chemical substance used, alterations were more evident in groups in which the surfaces were dried before laser irradiation. Fusion areas, craters, carbonization, and partially exposed tubules were verified. When the irradiation was performed in water, the smear layer was incorporated into the laser-modified surface. Among the specimens irrigated with EDTAC and laser-treated, partial obliteration of dentin tubules due to the laser action was verified; in addition, there was no remaining smear layer on the surfaces. Samples irrigated with sodium hypochlorite followed by laser irradiation demonstrated similar morphology to the samples in the Chlorhexidine group, with some fusion areas present and no exposed dentin tubules or fissures. The irradiation from an Nd:YAG laser in the presence of EDTAC solution provided a more favorable surface pattern compared to the other experimental conditions, due to the removal of the contaminated layer and the posterior sealing of dentin tubules.

Original languageEnglish (US)
Pages (from-to)641-646
Number of pages6
JournalGeneral Dentistry
Volume56
Issue number7
StatePublished - Nov 2008
Externally publishedYes

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Solid-State Lasers
Dentin
Lasers
Edetic Acid
Smear Layer
Neodymium
Sodium Hypochlorite
Chlorhexidine
Water
Electron Scanning Microscopy
cetrimonium

All Science Journal Classification (ASJC) codes

  • Dentistry(all)

Cite this

Faria, M. I. A., Souza-Gabriel, A. E., Marchesan, M., Sousa-Neto, M. D., & Silva-Sousa, Y. T. C. (2008). Ultrastructural evaluation of radicular dentin after Nd: YAG laser irradiation combined with different chemical substances. General Dentistry, 56(7), 641-646.

Ultrastructural evaluation of radicular dentin after Nd : YAG laser irradiation combined with different chemical substances. / Faria, M. I A; Souza-Gabriel, Aline Evangelista; Marchesan, Melissa; Sousa-Neto, Manoel Damiao; Silva-Sousa, Y. T C.

In: General Dentistry, Vol. 56, No. 7, 11.2008, p. 641-646.

Research output: Contribution to journalArticle

Faria, MIA, Souza-Gabriel, AE, Marchesan, M, Sousa-Neto, MD & Silva-Sousa, YTC 2008, 'Ultrastructural evaluation of radicular dentin after Nd: YAG laser irradiation combined with different chemical substances', General Dentistry, vol. 56, no. 7, pp. 641-646.
Faria, M. I A ; Souza-Gabriel, Aline Evangelista ; Marchesan, Melissa ; Sousa-Neto, Manoel Damiao ; Silva-Sousa, Y. T C. / Ultrastructural evaluation of radicular dentin after Nd : YAG laser irradiation combined with different chemical substances. In: General Dentistry. 2008 ; Vol. 56, No. 7. pp. 641-646.
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