1. Endodontics Section Department of Preventive and Restorative Dentistry School of Dentistry São Paulo State University (Unesp) AraçatubaBrazil
2. Endodontic Section Department of Restorative Dentistry School of Dentistry Universidade Federal de Minas Gerais Belo HorizonteBrazil
3. Vitreous Materials Laboratory (LaMaV) Department of Materials Engineering Federal University of São Carlos (UFSCar) São CarlosBrazil
4. Department of Basic Science School of Dentistry São Paulo State University (Unesp) Araçatuba Brazil