1. Graduate Program in Clinical Dentistry, Department of Prosthodontics and Periodontology, Piracicaba Dental School; State University of Campinas; Piracicaba São Paulo Brazil
2. Department of Restorative Dentistry, School of Dentistry; Federal University of Pelotas; Rio Grande do Sul Brazil
3. Graduate Program in Dentistry, School of Dentistry; Federal University of Pelotas; Rio Grande do Sul Brazil
4. Department of Oral and Maxillofacial Surgery and Maxillofacial Prosthodontics, School of Dentistry; Federal University of Pelotas; Rio Grande do Sul Brazil
5. Department of Prosthodontics and Periodontology, Piracicaba Dental School; State University of Campinas; Piracicaba São Paulo Brazil