1. Professor Doctor, Department of Restorative Dentistry of Dental School; Coordinator of the Extension Project “Dental Care for disabled; Federal University of Minas Gerais State; Minas Gerais Brazil
2. Professor Doctor, Department of Social and Preventive Dentistry; Dental School; Federal University of Minas Gerais State; Minas Gerais Brazil
3. Undergraduate student; Dental School; Federal University of Minas Gerais State; Minas Gerais Brazil
4. Professor Doctor, Department of Restorative Dentistry; Dental School; Federal University of Minas Gerais State; Minas Gerais Brazil
5. Professor Doctor, Department of Restorative Dentistry; Dental School; Federal University of Minas Gerais State; Minas Gerais Brazil.