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Journal of Biomedical Optics • Open Access

Fourier transform infrared photoacoustic spectroscopy study of physicochemical interaction between human dentin and etch-&-rinse adhesives in a simulated moist bond technique
Author(s): Adriana L. Ubaldini; Renata C. Pascotto; Mauro L. Baesso; Elizandra Sehn; Francielle Sato; Ana R. Benetti

Paper Abstract

The purpose of this study was to provide the physicochemical interactions at the interfaces between two commercial etch-&-rinse adhesives and human dentin in a simulated moist bond technique. Six dentin specimens were divided into two groups (n = 3) according to the use of two different adhesive systems: (a) 2-hydroxyethylmethacrylate (HEMA) and 4-methacryloxyethyl trimellitate anhydrate (4-META), and (b) HEMA. The Fourier transform infrared photoacoustic spectroscopy was performed before and after dentin treatment with 37% phosphoric acid, with adhesive systems and also for the adhesive systems alone. Acid-conditioning resulted in a decalcification pattern. Adhesive treated spectra subtraction suggested the occurrence of chemical bonding to dentin expressed through modifications of the OH stretching peak (3340  cm−1) and symmetric CH stretching (2900  cm−1) for both adhesives spectra; a decrease of orthophosphate absorption band (1040 to 970  cm−1) for adhesive A and a better resolved complex band formation (1270 to 970  cm−1) for adhesive B were observed. These results suggested the occurrence of chemical bonding between sound human dentin and etch-&-rinse adhesives through a clinical typical condition.

Paper Details

Date Published: 6 June 2012
PDF: 6 pages
J. Biomed. Opt. 17(6) 065002 doi: 10.1117/1.JBO.17.6.065002
Published in: Journal of Biomedical Optics Volume 17, Issue 6
Show Author Affiliations
Adriana L. Ubaldini, Univ. Estadual de Maringá (Brazil)
Renata C. Pascotto, Univ. Estadual de Maringá (Brazil)
Mauro L. Baesso, Univ. Estadual de Maringá (Brazil)
Elizandra Sehn, Univ. Estadual de Maringá (Brazil)
Francielle Sato, Univ. Estadual de Maringá (Brazil)
Ana R. Benetti, Univ. of Copenhagen (Denmark)


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