1. Department of Restorative Dentistry; Araraquara Dental School, UNESP-Univ Estadual Paulista; Araraquara; São Paulo; Brazil
2. Department of Dentistry, Endodontics and Dental Materials; São Paulo University; Bauru; São Paulo; Brazil
3. Department of Endodontics; Rio Grande do Sul Federal University; Rio Grande do Sul; Brazil