1. Laser Center, School of Dentistry, Federal University of Bahia, Salvador, Brazil.
2. Oral Pathology, School of Dentistry, Federal University of Bahia, Salvador, Brazil.
3. Universidade Camilo Castelo Branco, São José dos Campos, SP, Brazil.
4. Instituto Nacional de Ciência e Tecnologia de Óptica e Fotônica, São Carlos, SP, Brazil.