1. Virgílio Moreira Roriz, adjunct professor, Periodontology, Dentistry School, Federal University of Goias, Goiania, Goias, Brazil
2. Maria Luiza Lima Santana, MDSc, Federal University of Goias, Goiania, Goias, Brazil
3. Verônica Lima Boaventura, private clinical practice, Anápolis, Goias, Brazil
4. Edgar Dutra Zanotto, full professor, Department of Materials Engineering, Federal University of São Carlos, São Carlos, São Paulo, Brazil
5. Oscar Peitl Filho, full professor, Department of Materials Engineering, Federal University of São Carlos, São Carlos, São Paulo, Brazil
6. *Danilo Rocha Dias, adjunct professor, Department of Restorative Dentistry, Dentistry School, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais-Brazil