Effect of Bleaching on Staining Susceptibility of a Composite Resin
Objectives: To evaluate in vitro, the effect of at-home and in-office bleaching agents on staining susceptibility of a composite resin with subsequently immersion in staining solutions (coffee and red wine). Methods: 30 specimens of a microhybrid composite resin (Opallis, FGM) were made in a metallic matrix (2 mm thick and 5 mm diameter). The initial color of all specimens was evaluated with a spectrophotometer (Vita Easyshade), and then the specimens were randomly divided into 6 groups (n=5): G1: no bleaching, immersion in coffee; G2: no bleaching, immersion in red wine; G3: bleaching with 10% carbamide peroxide (CP10%, 10% Whiteness Class, FGM) and immersion in coffee; G4: bleaching with CP10% and immersion in wine; G5: bleaching with 35% hydrogen peroxide (HP35% - Whiteness HPMaxx, FGM) and immersion in coffee; G6: HP35% and immersion in wine. After the procedures, final color was evaluated for all groups. Color change values (CIELab), by means of L values – luminosity – were evaluated and statistically analyzed by ANOVA and Tukey’s post-test. Results: Means (standard-deviation) for initial L values were: G1: 88.22 (1.62); G2: 86.76 (0.86); G3: 82.52 (2.90); G4: 84.72 (1.24); G5: 85.64 (1.92); G6: 86.30 (1.13), and final L values were: G1: 78.32 (2.24); G2: 76.46 (1.61); G3: 74.60 (0.92); G4: 65.00 (3.97); G5: 75.56 (1.76); G6: 72.48 (4.69). Conclusion: There was an increased staining susceptibility of the composite resin submitted to at-home bleaching agent when immersed in red wine, compared to the other groups.
Division: IADR/AADR/CADR General Session
Meeting:2013 IADR/AADR/CADR General Session (Seattle, Washington) Location: Seattle, Washington
Year: 2013 Final Presentation ID:1140 Abstract Category|Abstract Category(s):Dental Materials 11: Color and Appearance (Esthetics)
Authors
Gomes, Osnara
( Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, , Brazil
)
Aleixo, Renata
( Centro de Ensino Superior dos Campos Gerais, Ponta Grossa, PR, N/A, Brazil
)
Bittencourt, Bruna Fortes
( Universidade Estadual De Ponta Grossa, Ponta Grossa, PR, N/A, Brazil
)
Ficinski, Renata
( Centro de Ensino Superior dos Campos Gerais, Ponta Grossa, PR, N/A, Brazil
)
Martins, Gislaine Cristine
( Universidade Estadual De Ponta Grossa, Ponta Grossa, PR, N/A, Brazil
)
Gomes, Giovana Mongruel
( Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, , Brazil
)
Farhat, Patricia Almeida
( Universidade Estadual De Ponta Grossa, Ponta Grossa, PR, N/A, Brazil
)