1. PhD Student; Department of Prosthodontics; School of Dentistry; University of São Paulo; Av. Prof. Lineu Prestes 2227 São Paulo-SP 05508-000 Brazil
2. Professor; Department of Prosthodontics; School of Dentistry; University of São Paulo; Av. Prof. Lineu Prestes 2227 São Paulo-SP 05508-000 Brazil
3. PhD Student; Department of Dentistry; McGill University; 2001 McGill College Avenue Suite 500 Montreal Quebec Canadá