Erosion effects on chemical composition and morphology of dental materials and root dentin

Erosion effects on chemical composition and morphology of dental materials and root dentin

Author Silva Soares, Luis Eduardo Google Scholar
Lima, Luciana Reinaldo Google Scholar
De Souzavieira, Lais Google Scholar
Do Espirito Santo, Ana Maria Autor UNIFESP Google Scholar
Martin, Airton Abrahao Google Scholar
Institution Univ Vale Paraiba
NOVAFAPI
Universidade Federal de São Paulo (UNIFESP)
Abstract Purpose: This work aims to study the erosion on restorative materials and on surrounding dentin. Fifty root dentin samples were obtained from bovine incisors. Methods: Twenty samples were not restored and thirty received cavity preparations. Samples were assigned to five groups: G1, G2: sound dentin (D); G3: composite resin (CR); G4: resin-modified glass-ionomer cement (RMGIC); G5: glass-ionomer cement (GIC). the samples of groups 25 were submitted to six cycles (demineralizationremineralization). Samples were analyzed by micro energy-dispersive X-ray fluorescence spectrometry (mu-EDXRF) and by scanning electron microscopy (SEM). Results: Mineral loss was greater in G2 samples than in RMGI > CR > GIC > D (control). SEM images showed pronounced dentin demineralization in groups 2 and 4. the acid erosion has a significant effect on mineral loss (Ca and P) of root dentin without restoration. Conclusions: Composite resin had the best chemical resistance to erosion among all the materials. Fluoride contained in GIC seemed to cause some protection, however, with material degradation. Chemical interaction of tooth-colored dental materials with root dentin could be assessed by mu-EDXRF. Microsc. Res. Tech. 75:703710, 2012. (C) 2011 Wiley Periodicals, Inc.
Keywords materials degradation
root dentin erosion
demineralization
X-ray fluorescence spectroscopy
scanning electron microscopy
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
UNIVAP
Grant number FAPESP: 05/50811-9
Date 2012-06-01
Published in Microscopy Research and Technique. Hoboken: Wiley-Blackwell, v. 75, n. 6, p. 703-710, 2012.
ISSN 1059-910X (Sherpa/Romeo, impact factor)
Publisher Wiley-Blackwell
Extent 703-710
Origin http://dx.doi.org/10.1002/jemt.21115
Access rights Closed access
Type Article
Web of Science ID WOS:000304250700001
URI http://repositorio.unifesp.br/handle/11600/34930

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