Color alteration in teeth subjected to different bleaching techniques

• Published in: Laser physics Vol. 20; no. 12; pp. 2066 - 2069
• Main Authors: Briso, A. L. F., Fonseca, M. S. M., de Almeida, L. C. A. G., Mauro, S. J., dos Santos, P. H.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01.12.2010; Springer
• Subjects: Biological and medical sciences; Biology; Fundamental and applied biological sciences. Psychology; General aspects, investigation technics, apparatus; Laser Methods in Chemistry; Lasers; Medicine; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; Tissues, organs and organisms biophysics; Artificial Saliva; Bleaching Agent; Bleaching Effect; Color Alteration; Laser Phys; Hydrogen peroxide; Laser beam; Physical radiation effects; Tungsten; Radiation source; Dentistry; Quartz; Spectrophotometry; Bleaching agent; Light emitting diode; Reflectance
• ISSN: 1054-660X; 1555-6611
• DOI: 10.1134/S1054660X10210036

This study evaluated the color alteration of teeth subjected to the action of different bleaching agents and the influence of light sources commonly used in association with these products, In GI, the specimens remained immersed in artificial saliva. The specimens in GII were bleached with a 10% carbamide peroxide gel 4 hours/day during 3 weeks; the teeth in the other three groups were subjected to three sessions of three 10-min applications of 35% hydrogen peroxide gel at 7-day intervals. In GIII, no light was used, while in GIV and GV the gel was associated with a quartz-tungsten-halogen light and a LED/laser source, respectively. The teeth color was evaluated before and 7 days after the bleaching sessions by reflectance spectrophotometry. Data were analyzed statistically by ANOVA and Fisher’s test (α = 0.05), and showed that a significant color change was obtained in all treated groups. After the first week of treatment and at the end of it, the bleaching protocols showed similar results. The results of the present study indicate that association of a light source is not necessary to obtain the bleaching effect and that optimal bleaching can be achieved with all techniques tested.