1. Department of Conservative Dentistry, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
2. Department of Endodontics, School of Dentistry, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil.
3. Department of Endodontics, School of Dentistry, State University of Western Paraná (UNIOESTE), Cascavel, PR, Brazil.