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Type: Artigo de periódico
Title: Morphological and chemical changes in dentin after using endodontic agents: Fourier transform Raman spectroscopy, energy-dispersive x-ray fluorescence spectrometry, and scanning electron microscopy study
Author: Pascon, FM
Kantovitz, KR
Soares, LES
Santo, AMD
Martin, AA
Puppin-Rontani, RM
Abstract: We examine the morphological and chemical changes in the pulp chamber dentin after using endodontic agents by scanning electron microscopy (SEM), Fourier transform Raman spectroscopy (FT-Raman), and micro energy-dispersive x-ray fluorescence spectrometry (mu EDXRF). Thirty teeth were sectioned exposing the pulp chamber and divided by six groups (n = 5): NT-no treatment; CHX-2% chlorhexidine; CHXE-2% chlorhexidine + 17% EDTA; E-17% EDTA; SH5-5.25% NaOCl; SH5E-5.25% NaOCl + 17% EDTA. The inorganic and organic content was analyzed by FT-Raman. mu EDXRF examined calcium (Ca) and phosphorus (P) content as well as Ca/P ratio. Impressions of specimens were evaluated by SEM. Data were submitted to Kruskal-Wallis and Dunn tests (p < 0.05). Differences were observed among groups for the 960 cm(-1) peak. Ca and P content differences were significant (SH5 > NT = SH5E > CHX > E > CHXE). CHXE and E presented the highest Ca/P ratio values compared to the other groups (p < 0.05). The SEM images in the EDTA-treated groups had the highest number of open tubules. Erosion in the tubules was observed in CHX and SH5E groups. Endodontic agents change the inorganic and organic content of pulp chamber dentin. NaOCl used alone, or in association with EDTA, was the most effective agent considering chemical and morphological approaches. (C) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). IDOL 10.1117/1.JBO.17.7.075008
Subject: dentin
energy dispersive x-ray fluorescence spectrometry
pulp chamber
Raman spectroscopy
scanning electron microscopy
Country: EUA
Editor: Spie-soc Photo-optical Instrumentation Engineers
Citation: Journal Of Biomedical Optics. Spie-soc Photo-optical Instrumentation Engineers, v. 17, n. 7, 2012.
Rights: aberto
Identifier DOI: 10.1117/1.JBO.17.7.075008
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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