1. Department of Restorative Dentistry, Passo Fundo Dental School; State University of Campinas; Piracicaba Brazil
2. Department of Prosthodontics and Periodontology; Piracicaba School of Dentistry, UNICAMP; Piracicaba Brazil
3. Department of Restorative Dentistry; State University of Campinas; Piracicaba Brazil
4. Department of Restorative Dentistry, College of Dentistry; University of Illinois at Chicago; Chicago IL