1. a Graduate student, School of Dentistry, Federal University of Goias, Goias, Brazil
2. b Adjunct Professor, Department of Prevention and Oral Rehabilitation, School of Dentistry, Federal University of Goias, Goias, Brazil
3. Corresponding author: Cláudio R. Leles, Universidade Federal de Goiás, Faculdade de Odontologia, Primeira Avenida, nú mero 1964, Setor Universitário, Goiânia, Goiás Brasil CEP 74.605-220 (crleles@odonto.ufg.br)