1. Viviane A Mergulhão, PhD, Department of Restorative Dentistry, University of Pernambuco, Brazil
2. Luciana S de Mendonça, PhD student, University of Pernambuco, Camaragibe, Brazil
3. Mônica S de Albuquerque, PhD student, Department of Restorative Dentistry, University of Pernambuco, Brazil
4. Rodivan Braz, PhD, DDS, professor, Department of Restorative Dentistry, University of Pernambuco, Camaragibe, Brazil