1. Post‐Graduate Program in Dental Sciences, Prosthetic Dentistry Unit, Faculty of Odontology Federal University of Santa Maria Santa Maria Brazil
2. Department of Conservative Dentistry Federal University of Rio Grande do Sul Porto Alegre Brazil
3. Department of Dental Materials and Prosthodontics São Paulo State University São José dos Campos Brazil
4. Department of Restorative Dentistry Federal University of Santa Maria Santa Maria Brazil