1. Department of Endodontics, School of Dentistry, Federal University of Amazonas, Manaus, Amazonas, Brazil.
2. Department of Endodontics, School of Dentistry, State University of Amazonas, Manaus, Amazonas, Brazil.
3. Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.