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Micro Energy-Dispersive X-Ray Fluoresence Mapping of Enamel and Dental Materials after Chemical Erosion

Published online by Cambridge University Press:  25 October 2012

Luís Eduardo Silva Soares ,
Rodrigo de Oliveira ,
Sídnei Nahórny ,
Ana Maria do Espírito Santo  and
Airton Abrahão Martin
Luís Eduardo Silva Soares*
Affiliation:
Universidade do Vale do Paraíba, UNIVAP, Research and Development Institute, IP&D Laboratory of Biomedical Vibrational Spectroscopy, LEVB, São José dos Campos, São Paulo, Brazil Universidade do Vale do Paraíba, UNIVAP, Faculty of Healt Sciences, FCS, School of Dentistry, São José dos Campos, São Paulo, Brazil
Rodrigo de Oliveira
Affiliation:
Universidade do Vale do Paraíba, UNIVAP, Research and Development Institute, IP&D Laboratory of Biomedical Vibrational Spectroscopy, LEVB, São José dos Campos, São Paulo, Brazil
Sídnei Nahórny
Affiliation:
Universidade do Vale do Paraíba, UNIVAP, Research and Development Institute, IP&D Laboratory of Biomedical Vibrational Spectroscopy, LEVB, São José dos Campos, São Paulo, Brazil
Ana Maria do Espírito Santo
Affiliation:
Universidade Federal de São Paulo/UNIFESP, Depto de Ciências Exatas e da Terra, Diadema, São Paulo, Brazil
Airton Abrahão Martin
Affiliation:
Universidade do Vale do Paraíba, UNIVAP, Research and Development Institute, IP&D Laboratory of Biomedical Vibrational Spectroscopy, LEVB, São José dos Campos, São Paulo, Brazil
*
*Corresponding author. E-mail: lesoares@univap.br
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Abstract

Energy-dispersive X-ray fluorescence was employed to test the hypothesis that beverage consumption or mouthwash utilization will change the chemical properties of dental materials and enamel mineral content. Bovine enamel samples (n = 45) each received two cavity preparations (n = 90), each pair filled with one of three dental materials (R: nanofilled composite resin; GIC: glass-ionomer cement; RMGIC: resin-modified GIC). Furthermore, they were treated with three different solutions (S: saliva; E: erosion/Pepsi Twist®; or EM: erosion+mouthwash/Colgate Plax®). It was found that mineral loss in enamel was greater in GICE samples than in RE > RMGICE > RMGICEM > REM > GICEM. An increased percentage of Zr was found in REM indicating organic matrix degradation. Dental materials tested (R, GIC, and RMGIC) were not able to protect adjacent enamel from acid erosion by the soft drink tested. The use of mouthwash promoted protection of enamel after erosion by the soft drink. To avoid chemical dissolution by mouthwashes, protection by resin composites with surface sealants is recommended.

Keywords

dental materialsteethmouthwashescarbonated beveragesX-ray spectrometry
Type
Biological Applications
Information
Microscopy and Microanalysis , Volume 18 , Issue 5 , October 2012 , pp. 1112 - 1117
Copyright
Copyright © Microscopy Society of America 2012

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