1. Department of Oral Medicine and Pediatric Dentistry; State University of Londrina; Londrina PR Brazil
2. Department of Endodontics; Faculty of Dentistry; Estácio de Sá University; Rio de Janeiro RJ Brazil
3. Department of Oral Pathology; Nova Friburgo Health Institute; Federal Fluminense University; Nova Friburgo RJ Brazil
4. Department of Endodontics; Nova Friburgo Health Institute; Federal Fluminense University; Nova Friburgo RJ Brazil