1. Graduate Program in Clinical Dentistry; Department of Prosthodontics and Periodontology; Piracicaba Dental School; State University of Campinas; Piracicaba SP Brazil
2. Department of Restorative Dentistry; School of Dentistry; Federal University of Pelotas; Pelotas RS Brazil
3. Graduate Program in Dentistry; School of Dentistry; Federal University of Pelotas; Pelotas RS Brazil
4. Department of Oral and Maxillofacial Surgery and Maxillofacial Prosthodontics; School of Dentistry; Federal University of Pelotas; Pelotas RS Brazil
5. Department of Prosthodontics and Periodontology; Piracicaba Dental School; State University of Campinas; Piracicaba Brazil