1. Department of Operative Dentistry, Endodontics and Dental MaterialsBauru School of Dentistry, Sao Paulo University ‐ USP Bauru SP Brazil
2. Department of Physiology and PathologyAraraquara School of Dentistry, Univ. Estadual Paulista ‐ UNESP Araraquara SP Brazil
3. Department of Orthodontics and Pediatric DentistryAraraquara School of Dentistry, Univ. Estadual Paulista – UNESP Araraquara SP Brazil
4. Department of PhysicsSchool of Sciences, Univ. Estadual Paulista – UNESP Bauru SP Brazil
5. Department of Cariology, Restorative Sciences, EndodonticsSchool of Dentistry, University of Michigan Ann Arbor Michigan