Institution: | 1. University of Zurich, Dental Materials Unit, Center for Dental and Oral Medicine, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Zurich, Switzerland;2. Department of Dental Materials and Prosthodontics, S?o Paulo State University at S?o Jose dos Campos, S?o Paulo, Brazil;3. Department of Prosthodontics, Paulista University at S?o Paulo, S?o Paulo, Brazil |