Investigation of photo-bleaching through transmittance method in pigmented solution: understanding possible mechanisms and advantages for photo dental whitening

The dental bleaching is known for many years. Recently a technique employing light has open up new and exciting possibilities. Besides its vast application there are still many important points to be understood about teeth photon bleaching. In this work we present an "in vitro" experiment to explore the main mechanisms involved during the photon action in tooth whitening. Our results indicated that light at same wavelengths are great absorbed by pigments creating a local heating which considerably increase the bleaching rate. This results in a fast reaction without heating the whole dental structure. We discuss details of our experiment. Work supported by Fapesp and CNPq.

[1]  Joyce E. Farrell,et al.  Grayscale/resolution tradeoffs in image quality , 1991 .

[2]  Martin D. Levine,et al.  Vision in Man and Machine , 1985 .

[3]  Tony Belpaeme,et al.  Reaching coherent color categories through communication , 2001 .

[4]  W. H. Bowles,et al.  Penetration of the pulp chamber by carbamide peroxide bleaching agents. , 1992, Journal of endodontics.

[5]  José Alberto Quintanilha.  Processamento de imagens digitais , 1990 .

[6]  Jae S. Lim,et al.  Two-Dimensional Signal and Image Processing , 1989 .

[7]  M. Tunçbilek,et al.  Penetration of the pulp chamber by carbamide peroxide bleaching agents on teeth restored with a composite resin. , 2000, Journal of oral rehabilitation.

[8]  Y. Li.  Peroxide-containing tooth whiteners: an update on safety. , 2000, Compendium of continuing education in dentistry. (Jamesburg, N.J. : 1995). Supplement.

[9]  Reinhold Kliegl,et al.  Color vision : perspectives from different disciplines , 1998 .

[10]  P. C. Narvai,et al.  A fluorose dentária no Brasil: uma revisão crítica , 2002 .

[11]  V. Haywood.  Dentine hypersensitivity: Bleaching and restorative considerations for successful management , 2002 .

[12]  D. Barnes,et al.  A clinical evaluation of 10 percent vs. 15 percent carbamide peroxide tooth-whitening agents. , 2000, Journal of the American Dental Association.

[13]  K. N. N. Leibovic,et al.  Science of Vision , 1990, Springer New York.

[14]  C. Scully,et al.  Hydrogen peroxide tooth-whitening (bleaching) products: Review of adverse effects and safety issues , 2006, British Dental Journal.