Affiliation: | 1. Department of Restorative Dentistry, Faculty of Dentistry , Federal University of Juiz de Fora , Juiz de Fora , Brazil;2. Dental Materials Unit , University of Zürich, Center for Dental and Oral Medicine, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science , Zurich , Switzerland;3. Prosthodontic Unit, Faculty of Odontology , Federal University of Santa Maria , Santa Maria , RS , Brazil;4. Department of Dental Materials and Prosthodontics , S?o Jose dos Campos Dental School, S?o Paulo State University (UNESP) , S?o Jose dos Campos , SP , Brazil |