%0 Journal Article
%T Evaluation of tooth color after bleaching with and without light-activation =Avalia  o da colora  o dental ap車s clareamento com e sem ativa  o por luz
%A Roberto
%A Andiara Ribeiro et al.
%J Revista Odonto Ci那ncia
%D 2011
%I Editora da Pontif赤cia Universidade Cat車lica do Rio Grande do Sul (EDIPUCRS)
%X Objetivo: o uso de diferentes fontes de luz como auxiliar no clareamento de consult車rio tem sido descrita na literatura. Assim, o objetivo deste estudo foi avaliar as altera  es da cor dos dentes ap車s a aplica  o de t谷cnicas de clareamento com diferentes produtos, com e sem ativa  o por um sistema de LED-laser. Metodologia: Vinte-quatro superf赤cies de dentes bovinos foram submetidas a tr那s t谷cnicas de clareamento com dois agentes clareadores dispon赤veis comercialmente 角 base de per車xido de carbamida a 35% (n=8). Os esp谷cimes foram inicialmente imersos em vinho tinto por 48 h a 37∼C, e submetidos 角s t谷cnicas de clareamento. As altera  es de cor foram mensuradas antes e ap車s o manchamento, bem como imediatamente e 24 hs ap車s as t谷cnicas de clareamento, por meio de dois diferentes m谷todos de avalia  o da cor: software ScanWhite V1. 1 e espectrofot metro intra-oral Vita Easyshade. Os dados foram analisados pelos testes de ANOVA e Kruskal-Wallis. Resultados: A an芍lise estat赤stica n o apontou diferen as significantes entre os diferentes grupos testados, independentemente do per赤odo de avalia  o, m谷todo de avalia  o ou uso do sistema LED-laser. Conclus o: Os resultados sugeriram que o uso da luz n o influenciou nas mudan as de cor. Purpose: The use of different light sources as an adjunct to in-office bleaching has been questioned. Thus, the aim of this study was to evaluate the color changes of teeth after application of bleaching techniques with different products, with and without activation by a LED-laser system. Methods: Twenty-four bovine teeth surfaces were submitted to three bleaching techniques with two commercially available 35% hydrogen peroxide bleaching agents (n=8). The specimens were immersed in red wine for 48 h at 37∼C and submitted to the bleaching techniques. Color changes were measured before and after staining as well as immediately after and 24 h after the bleaching treatments, with two different methods of color evaluation, software ScanWhite V1. 1 and intra-oral spectrophotometer (Vita Easyshade). Data were analyzed by ANOVA and Kruskal-Wallis test. Results: The statistical analysis showed that there was no statistically significant difference at 5% of significance level between the different groups, independently of the evaluation time, evaluation methods or the use of LED-laser systems. Conclusion: The results suggested that the use of light in the bleaching techniques did not influence the color changes.
%K ODONTOLOGIA
%K DENTES - CLAREAMENTO
%U http://revistaseletronicas.pucrs.br/ojs/index.php/fo/article/view/9167/6887