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Scanning Electron Microscopy and Roughness Study of Dental Composite Degradation

Published online by Cambridge University Press:  13 February 2012

Luís Eduardo Silva Soares ,
Louise Ribeiro Cortez ,
Raquel de Oliveira Zarur  and
Airton Abrahão Martin
Luís Eduardo Silva Soares*
Affiliation:
Department of Dental Materials and Operative Dentistry, School of Dentistry, University of Vale do Paraíba, UNIVAP, 12244-000, São José dos Campos, SP, Brazil Laboratory of Biomedical Vibrational Spectroscopy, Research and Development Institute, IP&D, University of Vale do Paraíba, UNIVAP, 12244-000, São José dos Campos, SP, Brazil
Louise Ribeiro Cortez
Affiliation:
Laboratory of Biomedical Vibrational Spectroscopy, Research and Development Institute, IP&D, University of Vale do Paraíba, UNIVAP, 12244-000, São José dos Campos, SP, Brazil
Raquel de Oliveira Zarur
Affiliation:
Laboratory of Biomedical Vibrational Spectroscopy, Research and Development Institute, IP&D, University of Vale do Paraíba, UNIVAP, 12244-000, São José dos Campos, SP, Brazil
Airton Abrahão Martin
Affiliation:
Laboratory of Biomedical Vibrational Spectroscopy, Research and Development Institute, IP&D, University of Vale do Paraíba, UNIVAP, 12244-000, São José dos Campos, SP, Brazil
*
Corresponding author. E-mail: [email protected]
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Abstract

Our aim was to test the hypothesis that the use of mouthwashes, consumption of soft drinks, as well as the type of light curing unit (LCU), would change the surface roughness (Ra) and morphology of a nanofilled composite resin (Z350® 3M ESPE). Samples (80) were divided into eight groups: Halogen LCU, group 1, saliva (control); group 2, Pepsi Twist®; group 3, Listerine®; group 4, Colgate Plax®; LED LCU, group 5, saliva; group 6, Pepsi Twist®; group 7, Listerine®; group 8, Colgate Plax®. Ra values were measured at baseline, and after 7 and 14 days. One specimen of each group was prepared for scanning electron microscopy analysis after 14 days. The data were subjected to multifactor analysis of variance at a 95% confidence followed by Tukey's honestly significant difference post-hoc test. All the treatments resulted in morphological changes in composite resin surface, and the most significant change was in Pepsi Twist® groups. The samples of G6 had the greatest increase in Ra. The immersion of nanofilled resin in mouthwashes with alcohol and soft drink increases the surface roughness. Polymerization by halogen LCU (reduced light intensity) associated with alcohol contained mouthwash resulted in significant roughness on the composite.

Keywords

composite resinsmouthwashescarbonated beveragesscanning electron microscopysurface roughness
Type
Biological and Biomedical Applications
Information
Microscopy and Microanalysis , Volume 18 , Issue 2 , April 2012 , pp. 289 - 294
Copyright
Copyright © Microscopy Society of America 2012

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