Effect of Opalescence® bleaching gels on the elution of dental composite components

Schuster, Lena; Rothmund, Lena; He, Xiuli; Landuyt, Kirsten Van; Schweikl, Helmut; Hellwig, Elmar; Carell, Thomas; Hickel, Reinhard; Reichl, Franz‐Xaver; Högg, Christof

doi:10.1016/j.dental.2015.03.016

Cited by 23 publications

(14 citation statements)

References 43 publications

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“…Composite resins are considered to be very stable in structure; however, the resins cannot be fully polymerized intraorally, and residual monomer may be released into the saliva (10). Monomer release from composite resins has been evaluated in many studies; however, very little data is available on the effect of bleaching on monomer release (11,12).…”

Section: Monomer Release From Nanohybrid Composites After Bleachingmentioning

confidence: 99%

Monomer release from nanohybrid composites after bleaching

et al. 2019

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The evaluation of the effect of bleaching on monomer release from two composite resins was performed by bleaching two nanohybrid composite resins Filtek Z550 and Tetric N-Ceram using two bleaching products Whiteness HP Maxx and Vivastyle. In total, 20 samples were made from each composite resin from which four groups were fabricated (two for each bleaching product). The samples were stored in a 75% ethanol solution, and the solutions were renewed after 1, 7, and 28 days. The monomer release was analyzed using high performance liquid chromatography. The data were analyzed using repeated measures analysis of variance and least significant difference multiple comparison test (α = 0.05). Monomers were found to be released from both composite resins. The amounts of monomer released were found to decrease over time (P < 0.05); however, the resins were not affected by bleaching, and the released monomers were well below toxic doses.

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Section: Monomer Release From Nanohybrid Composites After Bleachingmentioning

confidence: 99%

Monomer release from nanohybrid composites after bleaching

et al. 2019

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“…13 Thermal cycles yield volumetric changes that can enhance possible defects in the composite specimens with possible higher penetration of the staining solution into the porous material. Regarding the propensity to staining, the color of resin-based materials can also be modified by bleaching agents, 14 while the ultimate composite color can be improved so that it does not present a perceptible difference from that observed prior to staining. 9,10 Regarding the color measurement, the system established by the Commission Internationale de L'Eclairage (CIE) in 1978 is commonly used in dentistry.…”

Section: Introductionmentioning

confidence: 99%

Effects of adhesive used as modeling liquid on the stability of the color and opacity of composites

Araújo

Barros

Santana

et al. 2018

J Esthet Restor Dent

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This study evaluates whether using adhesive systems for modeling a composite affects the color and opacity changes caused by staining solutions followed by a bleaching procedure. The findings suggest that the use of a universal adhesive as modeling liquid can reduce the alterations in optical properties caused by staining solutions, and the application of high-concentrated hydrogen peroxide over the composite reduce the color changes without fully recover the initial color.

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“…Monomers, initiators, stabilizers, additives and pigments are part of the organic matrix of the composite resins [23]. Bis-GMA (Bisphenol A, Glycidyl Methacrylate) and UDMA (urethane dimethacrylate) have a high molecular weight and have a highly viscous consistency, so they need to be added to other components for the development of a softer and more manipulative composite resin.…”

Section: Discussionmentioning

confidence: 99%

“…Another variable to be considered is the degree of conversion of the composite resins. The composition is completely related to the conversion degree of the resins and the incomplete polymerization of the material raises the level of residual (co)monomers [23]. These (co)monomers are cytotoxic and may cause allergies, in addition to impairing the properties of the material, such as color stability and hardness [27,28].…”

Section: Discussionmentioning

confidence: 99%

The impact of at home and in-office bleaching agents on the color stability of bulk-fill composite resins

Araújo

Lemes

Pachito

et al. 2019

BDS

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Objective: This study compared different composites for color stability after exposure to at home and in-office bleaching gels. Material and Methods: Composite resin specimens (6mm diameterx2mm thickness) were manufactured according to the following groups (n=20): RC- Conventional; BF-Bulk Fill; RF-Flow; BFF-Bulk-Fill Flow. The surfaces were stained with coffee solution for 36hrs. A spectrophotometer was used to record the initial color (L*a*b*). Half of the specimens from each group underwent bleaching with 35% hydrogen peroxide (in-office) in three 45-minute applications. New color measurements were performed after 7, 14 and 21 days. The other half of the specimens underwent bleaching with 22% carbamide peroxide (at home) in 14 1-hour applications. Further color measurements were performed after 7 and 14 hours. For comparison between the color coordinates in different periods, ANOVA for repeated measures was applied (α=5%). The color variation (ΔE) was calculated for each group. Results: For in-office bleaching, there were no significant differences between the periods b* coordinate of the RF group, and for L* and b* coordinates of the BFF group. For at home bleaching the groups BF and BFF showed no differences for the L* coordinate. For the other coordinates, there was difference between the initial periods and after 14 days. The ΔE variation presented higher values for the at home bleaching groups. For both whiteners the bulk-fill resins presented the greatest color variations. Conclusions: Bulk Fill resins do not guarantee greater color stability than the other composite resins tested, including conventional flow resin. The conventional composite resin showed the lower ΔE.

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Effect of Opalescence® bleaching gels on the elution of dental composite components

Abstract: Bleaching treatments can lead to a reduced or an increased elution of substances from the dental composites.

Cited by 23 publications

References 43 publications

Monomer release from nanohybrid composites after bleaching

Monomer release from nanohybrid composites after bleaching

Effects of adhesive used as modeling liquid on the stability of the color and opacity of composites

The impact of at home and in-office bleaching agents on the color stability of bulk-fill composite resins

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