1. Department of Prosthodontics; Universidade Paulista; São Paulo Brazil
2. Department of Dental Materials and Prosthodontics; UNESP SJC; São José dos Campos Brazil
3. Department of Cardiovascular and Thoracic Surgery; Universidade de São Paulo; Brazil
4. Department of Social Dentistry; São Paulo State University; São José dos Campos Brazil
5. University of Zurich, Dental Materials Unit, Center for Dental Medicine; Clinic for Fixed and Removable Prosthodontics and Dental Materials Science; Zurich Switzerland