1. Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas (UNICAMP), 901 Limeira Avenue, Piracicaba, São Paulo 13414-903, Brazil
2. Department of Oral Health and Diagnostic Sciences, University of Connecticut Health Center, 263 Farmington Avenue, Farmington, Connecticut 06030, United States
3. Dental Research Division, Guarulhos University, 88 Eng. Prestes Maia Street, Guarulhos, São Paulo 07023-070, Brazil
4. Laboratory of Technological Plasmas, Institute of Science and Technology, São Paulo State University (UNESP), 511 Três de Março Avenue, Sorocaba, São Paulo 18087-180, Brazil