1. Post Graduation Program in Dentistry Department of Restorative Dentistry Faculty of Dentistry University of São Paulo São Paulo Brazil
2. Discipline of Endodontics Faculty of Dentistry University Santa Cecília Santos Brazil
3. Post Graduation Program in Dental Sciences University Christus Fortaleza Brazil
4. Post Graduation Program in Dentistry Department of Restorative Dentistry Faculty of Dentistry University of São Paulo Bauru Brazil