1. Department of Prosthodontics and Periodontology, Piracicaba Dental SchoolUniversity of Campinas (UNICAMP) Piracicaba Brazil
2. Department of Dental Materials and Prosthodontics, Aracatuba Dental SchoolSão Paulo State University (UNESP) Araçatuba Brazil
3. School of DentistryUNIEURO University Center Brasília Brazil
4. Technological Plasma Laboratory (LaPTec), Experimental Campus of SorocabaSão Paulo State University (UNESP) Sorocaba Brazil