1. Postgraduate Program in Oral Science, Division of Restorative Dentistry Federal University of Santa Maria (UFSM) Santa Maria Rio Grande do Sul Brazil
2. Postgraduate Program in Dentistry, School of Dentistry Meridional Faculty (IMED) Passo Fundo Rio Grande do Sul Brazil
3. Postgraduate Program in Oral Science, Faculty of Dentistry Federal University of Santa Maria (UFSM) Santa Maria Rio Grande do Sul Brazil