1. Private Practice; Fortaleza CE Brazil
2. Department of Dentistry, Endodontics and Dental Materials; Bauru Dental School; University of São Paulo; Bauru SP Brazil
3. School of Dentistry of Ceará; São Leopoldo Mandic University; Fortaleza CE Brazil
4. School of Dentistry of Sobral; Federal University of Ceará; Sobral CE Brazil