Joe C Ontiveros1, Rade D Paravina. 1. Department of Restorative Dentistry and Biomaterials, The University of Texas Dental Branch at Houston, Houston, TX 77030, USA. joe.c.ontiveros@uth.tmc.edu
Abstract
OBJECTIVES: The aim of this clinical study was to evaluate tooth color change after exposure to 25% hydrogen peroxide in-office tooth whitening system, with and without supplementary light exposure. METHODS:Twenty subjects were treated with two separate 45-min exposures of bleach, with and without light using an opposing-arch design. Visual and instrumental color measurements were obtained from eighty teeth before bleaching and seven days after treatment using two different shade guides, Vitapan Classical (VC), Vita Bleachedguide 3D-Master (BG) and an intraoral spectrophotometer. Data were analyzed using ANOVA, paired t-test, and Wilcoxon signed rank tests at the 0.05 level of significance. RESULTS: Instrumental method revealed significant difference in color between treatment with light (DeltaE(ab)(*)=6.0) and without light (DeltaE(ab)(*)=4.7) after seven days (p<0.05). No differences were visually detected between treatment with light and without light using the VC (p=0.56). However, a significant difference was recorded using the BG (p<0.01). Instrumental measurements of color change were in better accordance with visual findings using the BG guide (R(2)=0.60) rather than the VC (R(2)=0.20). CONCLUSIONS: Within the limitations of this study, the treatment with supplementary light showed significantly greater bleaching-dependent changes in color compared to treatment without light when assessed using instrumental methods. The same was determined for the visual method with Vita Bleachedguide 3D-Master. No significant difference in color change with respect to light exposure was detected for the Vitapan Classical.
RCT Entities:
OBJECTIVES: The aim of this clinical study was to evaluate tooth color change after exposure to 25% hydrogen peroxide in-office tooth whitening system, with and without supplementary light exposure. METHODS: Twenty subjects were treated with two separate 45-min exposures of bleach, with and without light using an opposing-arch design. Visual and instrumental color measurements were obtained from eighty teeth before bleaching and seven days after treatment using two different shade guides, Vitapan Classical (VC), Vita Bleachedguide 3D-Master (BG) and an intraoral spectrophotometer. Data were analyzed using ANOVA, paired t-test, and Wilcoxon signed rank tests at the 0.05 level of significance. RESULTS: Instrumental method revealed significant difference in color between treatment with light (DeltaE(ab)(*)=6.0) and without light (DeltaE(ab)(*)=4.7) after seven days (p<0.05). No differences were visually detected between treatment with light and without light using the VC (p=0.56). However, a significant difference was recorded using the BG (p<0.01). Instrumental measurements of color change were in better accordance with visual findings using the BG guide (R(2)=0.60) rather than the VC (R(2)=0.20). CONCLUSIONS: Within the limitations of this study, the treatment with supplementary light showed significantly greater bleaching-dependent changes in color compared to treatment without light when assessed using instrumental methods. The same was determined for the visual method with Vita Bleachedguide 3D-Master. No significant difference in color change with respect to light exposure was detected for the Vitapan Classical.
Authors: Linda Phi; Reem Ajaj; Manisha H Ramchandani; Xenia Mc Brant; Oluwadayo Oluwadara; Olga Polinovsky; David Moradi; Andre Barkhordarian; Pathu Sriphanlop; Margaret Ong; Amy Giroux; Justin Lee; Muniza Siddiqui; Nora Ghodousi; Francesco Chiappelli Journal: Open Dent J Date: 2012-01-25
Authors: Rafael Francisco Lia Mondelli; Juliana Felipi David E Góes de Azevedo; Ana Carolina Francisconi; Cristiane Machado de Almeida; Sérgio Kiyoshi Ishikiriama Journal: J Appl Oral Sci Date: 2012 Jul-Aug Impact factor: 2.698