1. Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil.
2. Department of Restorative Dentistry, University of Taubaté Rua dos Operários, Taubaté, São Paulo, Brazil.
3. Laboratory of Biomedical Vibrational Spectroscopy, Research and Development Institute, University of Vale do Paraíba, São José dos Campos, São Paulo, Brazil.
4. Department of Dental Materials and Operative Dentistry, School of Dentistry, University of Vale do Paraíba, São José dos Campos, São Paulo, Brazil.
5. Institute of Chemistry, State University of Campinas, Cidade Universitária Zeferino Vaz Campinas, Barão Geraldo, Campinas, São Paulo, Brazil.