Journal ArticleDOI
The effect of current bleaching agents on the color of light-polymerized composites in vitro.
Senay Canay,Murat C. Çehreli +1 more
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TLDR
The color changes for all restorative materials tested were clinically detectable after the application of 10% hydrogen peroxide, however, clinically noticeable discoloration was observed only for Dyract AP treated with 10% carbamide peroxide.Abstract:
Statement of problem Bleaching agents may affect the color of existing composite restorations. Purpose The purpose of this study was to compare the effect of 10% carbamide peroxide and 10% hydrogen peroxide on the color of light-polymerized hybrid, macrofilled, and polyacid-modified composites. Material and methods Two light-polymerized hybrid composites (3M Valux and Spectrum TPH), 1 macrofilled condensable composite (Solitaire), and 2 polyacid-modified composites (Dyract AP and Compoglass) were used. The hybrid composites served as controls. The color of 8 specimens of each material was analyzed by use of a spectrophotometer before bleaching. The specimens were then divided randomly into 2 subgroups (n=4). One group was immersed in 10% carbamide peroxide solution and the other in 10% hydrogen peroxide, for 8 hours each for 14 consecutive days. After bleaching, color changes (Δ E) were determined for each material and compared by use of the Kruskal-Wallis test, followed by the Mann-Whitney U test ( P Results After bleaching with carbamide peroxide, the color changes (ΔE) for Dyract AP (2.18; SD=1.41), Compoglass (1.14; SD=0.26) and Solitaire (1.56; SD=0.89) were higher than the color changes recorded for 3M Valux (0.63; SD=3.60), and Spectrum TPH (0.66; SD=1.24). The differences between materials bleached with carbamide peroxide were not statistically significant. After bleaching with hydrogen peroxide, the color changes for Dyract AP (9.39; SD=0.53) and Compoglass (5.15; SD=0.52) were higher than the changes recorded for Spectrum TPH (4.53; SD=1.53) and 3M Valux (3.41; SD=4.40), whereas the color change of Solitaire (3.69; SD=0.57) was significantly higher than that of 3M Valux ( P =.01). The color changes for all restorative materials tested were clinically detectable after the application of 10% hydrogen peroxide. However, clinically noticeable discoloration was observed only for Dyract AP treated with 10% carbamide peroxide. Conclusion In comparison to 10% carbamide peroxide, 10% hydrogen peroxide caused more color changes in the composites tested.read more
Citations
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Journal ArticleDOI
Effects of staining and bleaching on color change of dental composite resins
TL;DR: The nanocomposite (FS) changed color more than the microhybrid composite (EX) as a result of staining in coffee or red wine solutions, and was more affected by the wine solution.
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Effect of bleaching on restorative materials and restorations—a systematic review
TL;DR: Advice is provided based on the current literature to minimize the impact of bleaching therapies on restorative materials and restorations.
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Tooth-bleaching procedures and their controversial effects: A literature review
TL;DR: Clinicians will improve their understanding of the history of bleaching procedures, bleaching types, components, mechanisms, and their effects on soft tissue, tooth structures, resin composite, and bonding to help reduce risks for patients.
Journal ArticleDOI
Tooth bleaching with nonthermal atmospheric pressure plasma.
TL;DR: It is suggested that the improvement in tooth bleaching induced by plasma is due to the removal of tooth surface proteins and to increased *OH production.
Journal ArticleDOI
Carbamide peroxide bleaching agents: effects on surface roughness of enamel, composite and porcelain
Rafael R. Moraes,J. L. M. Marimon,Luis Felipe Jochims Schneider,L. Correr Sobrinho,Guilherme Brião Camacho,Márcia Bueno +5 more
TL;DR: This study examined the effect of 10 and 35% carbamide peroxide bleaching agents on the surface roughness of enamel, feldspathic porcelain, and microfilled and microhybrid composite resins.
References
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Journal ArticleDOI
Assessment of Appearance Match by Visual Observation and Clinical Colorimetry
William M. Johnston,E.C. Kao +1 more
TL;DR: The overlap in ranges of the color differences for those comparisons rated matches and mismatches indicates the importance of other factors in appearance matching, such as translucency and the effects of other surrounding visual stimuli.
Journal ArticleDOI
Color stability of dental composite resin materials for crown and bridge veneers
I.E. Ruyter,K. Nilner,B. Möller +2 more
TL;DR: The color stability of 3 light-polymerized veneer materials were investigated and compared to that of 3 conventional heat- and auto-polymers materials and the accelerated test had the ability to discriminate between the various products.
Journal ArticleDOI
Visual and Instrumental Colorimetric Assessments of Small Color Differences on Translucent Dental Porcelain
TL;DR: The results support the use of the CIELAB colorimetric system in dentistry as a means of evaluating color by differences and could serve as a valuable tool for material selection and restoration design, particularly in the area of aesthetic restorative dentistry.
Journal Article
Effects of hydrogen peroxide-containing bleaching agents on the morphology of human enamel.
TL;DR: Comparison to the untreated control surfaces revealed that enamel exposed to the bleaching agents underwent slight morphologic surface alterations, while the enamel surfaces treated with phosphoric acid showed severe morphologic alterations.
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