1. Graduate Program in Dentistry, Meridional Faculty, IMED, Passo Fundo, RS, Brazil
2. Department of Prosthodontics and Periodontology, Piracicaba Dental School, State University of Campinas, FOP/UNICAMP, Piracicaba, SP, Brazil
3. Graduate Program in Dentistry, University of Passo Fundo, Passo Fundo, RS, Brazil