[1] Univ Fed Mato Grosso do Sul, Dent Sch Prof Albino Coimbra Filho, Campo Grande, MS, Brazil
[2] UNESP Univ Estadual Paulista, Dept Restorat Dent, Araraquara Sch Dent, Araraquara, SP, Brazil
[3] Univ Sao Paulo, Biophoton Lab, Phys Inst Sao Carlos, Sao Carlos, SP, Brazil