1. Esthetic Dentistry, Faculty of Ribeirão Preto, University of São Paulo (FORP-USP), São Paulo, Brazil.
2. Laser in Dentistry, Physics Institute of São Carlos, University of São Paulo (USP), and Laser in Dentistry, Faculty of Odontology of Araraquara, University of State of São Paulo (UNESP), São Paulo, Brazil.
3. Physics Institute of São Carlos, University of São Paulo (USP), São Paulo, Brazil.
4. Operative Dentistry, Faculty of Odontology of Araraquara, University of State of São Paulo (UNESP), São Paulo, Brazil.
5. Physics and Material Science, Physics Institute of São Carlos, University of São Paulo (USP), São Paulo, Brazil.