1. Department of Endodontics; Faculty of Dentistry; Estácio de Sá University; Rio de Janeiro Brazil
2. Department of Endodontics; Faculty of Dentistry; Grande Rio University; Duque de Caxias Brazil
3. Department of Endodontics; Federal University of Campina Grande; Campina Grande Brazil
4. Department of Health; Dentistry Division; Southwest State University of Bahia; Jequié Brazil
5. Department of Endodontics; Vila Velha University; Vila Velha Brazil