1. Faculty of Dentistry Federal University of Rio Grande do Sul Porto Alegre Brazil
2. Department of Stomatology, School of Dentistry Federal University of Santa Maria Santa Maria Brazil
3. Institute of Psychology Federal University of Rio Grande do Sul Porto Alegre Brazil
4. Pediatric Dentistry Department Federal University of Rio Grande do Sul Porto Alegre Brazil
5. Preventive and Social Dentistry Department Federal University of Rio Grande do Sul Porto Alegre Brazil