1. Department of Prosthodontics Bauru School of Dentistry University of São Paulo Bauru Brazil
2. Department of Operative Dentistry Endodontics and Dental Materials Bauru School of Dentistry University of São Paulo Bauru Brazil
3. Department of Chemistry School of Sciences São Paulo State University Bauru Brazil
4. Department of Physics School of Sciences São Paulo State University Bauru Brazil
5. Department of Mechanical Engineering São Carlos School of Engineering University of São Paulo São Carlos Brazil