Effect of Different Light Sources and Enamel Preconditioning on Color Change, H2O2 Penetration, and Cytotoxicity in Bleached Teeth

Autor(es)

Goncalves, R. S. ^[1] ; Costa, C. A. S. ^[2] ; Soares, D. G. S. ^[3] ; dos Santos, P. H. ^[3] ; Cintra, L. T. A. ^[1] ; Briso, A. L. F. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, UNESP, Dept Restorat Dent, Aracatuba Dent Sch, Sao Paulo - Brazil

^[2] Univ Estadual Paulista, UNESP, Dept Physiol & Pathol, Araraquara Sch Dent, Sao Paulo - Brazil

^[3] Univ Estadual Paulista, UNESP, Dept Dent Mat & Prosthodont, Araraquara Sch Dent, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Operative Dentistry; v. 41, n. 1, p. 83-92, JAN-FEB 2016.
• Citações Web of Science: 3

Resumo

This study evaluated the effects of acid etching of the enamel and the combination of different light sources (halogen light, light-emitting diodes {[}LEDs], and LED/Laser) and the bleaching product on color change, penetration of hydrogen peroxide (H2O2), and cytotoxicity over time. The color change (DE) and the amount of H2O2 that permeated the tooth tissue were analyzed using a spectrophotometer. Cell metabolism and morphology were evaluated using the methylthiazol tetrazolium assay and scanning electron microscopy, respectively. The DE values and H2O2 permeation were not significantly different under any of the experimental conditions. Tooth whitening significantly reduced cell metabolism, regardless of whether a light source was used. Preconditioning the enamel did not influence the cellular metabolism in any group. In conclusion, combining the bleaching product with different light sources and/or preconditioning the enamel resulted in few significant changes in color, transenamel and transdentinal penetration of H2O2, or cytotoxicity and cell morphology. (AU)

• Processo FAPESP: 10/17637-3 - Avaliação da alteração de cor, difusão de peróxido de hidrogênio e citotoxicidade trans-amelodentinária causados por diferentes técnicas de clareamento dental
• Beneficiário: André Luiz Fraga Briso
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 12/06066-0 - Efeito de Diferentes Fontes Luminosas e Condicionamento do Esmalte na Penetração de H2O2,Citotoxicidade e na Alteração de Cor Ocorrida em Dentes Bovinos Clareados
• Beneficiário: Rafael Simões Gonçalves
• Modalidade de apoio: Bolsas no Brasil - Mestrado