1. Department of Cariology, Restorative Sciences and Endodontics University of Michigan Ann Arbor MI USA
2. Department of Preventive and Restorative Dentistry School of Dentistry São Paulo State University (Unesp) Araçatuba Brazil
3. Division of Endodontics University of Detroit Mercy School of Dentistry Detroit MI USA
4. Dental Assistance Center for Disabled Persons (CAOE) of the São Paulo State University (UNESP) School of DentistryAraçatuba Brazil