1. School of Health and Biosciences; Pontifícia Universidade Católica do Paraná; Curitiba Brazil
2. Department of Oral Surgery and Pathology; School of Dentistry; Universidade Federal de Minas Gerais; Belo Horizonte Brazil
3. Department of Community and Preventive Dentistry; School of Dentistry; Universidade Federal de Minas Gerais; Belo Horizonte Brazil