1. Endodontic Section, Department of Preventive and Restorative Dentistry, School of Dentistry São Paulo State University (Unesp) Araçatuba Brazil
2. Department of Basic Science, School of Dentistry São Paulo State University (Unesp) Araçatuba Brazil
3. School of Dentistry Dental Assistance Center for Disabled Persons (CAOE) of the São Paulo State University (UNESP) Araçatuba Brazil