1. Department of Restorative Dentistry; Ribeirão Preto Dental School; State University of São Paulo; Ribeirão Preto SP Brazil
2. Department of Prosthodontics; Bauru Dental School; State University of São Paulo; Bauru SP Brazil
3. Department of Odontology; Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
4. Department of Dentistry; State University of Maringá; Maringá Paraná Brazil