1. Faculty of Dentistry; Department of Community and Preventive Dentistry; Universidade Federal de Minas Gerais; Minas Gerais Brazil
2. Faculty of Dentistry; Department of Oral Surgery and Pathology; Universidade Federal de Minas Gerais; Minas Gerais Brazil
3. Faculty of Medicine; Department of Surgery; Universidade Federal de Minas Gerais; Minas Gerais Brazil