Effect of whitening gels on the surface roughness of restorative materials in situ

Silva, M.F. de A.; Davies, Robin; Stewart, Bernal; DeVizio, William; Tonholo, Josealdo; Júnior, José Ginaldo da Silva; Pretty, Iain A.

doi:10.1016/j.dental.2005.11.029

Cited by 54 publications

(37 citation statements)

References 10 publications

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“…This would lead to a more porous surface rising the percolation way for either the staining solution or the whitener. However, neither conditioning in water, nor in the staining solution, nor the whitening procedure were sufficient to increase surface roughness, similar to other studies 2,14 .…”

Section: Discussionsupporting

confidence: 66%

“…Usually, the protocol involves advising patients that restored anterior teeth to be whitened would probably have the restoration replaced after tooth whitening, due to discrepancies of color between the recently whitened tooth structure and the restoration 2,3 . However, it is not uncommon the report of dentists that replacing the restoration was not necessary due to color match with the bleached tooth.…”

Section: Introductionmentioning

confidence: 99%

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Tooth whitening recovers the color of pre-stained composites

et al. 2017

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Aim: To assess the effect of home-whitening on aged and stained composite. Methods: Fifteen discshaped specimens (10 mm diameter x 2 mm thick) of Filtek Z350XT, shade A2E were fabricated, polished and embedded in wax, leaving exposed the top surface. The specimens were allocated to three groups (n=5): A -the specimens remained dry; B -conditioning in distilled water and; C -conditioning in distilled water and coffee. They were next subjected to whitening with 10% carbamide peroxide (Whiteness Perfect) for 4 h daily for 1, 2 and 4 weeks. Shade was measured with a spectrophotometer Easyshade and expressed based on the CIE L*a*b* system (ΔE*). Surface roughness was measured with a roughness meter (Ra-µm). Data were analyzed with two-way ANOVA and Tukey's test (α=0.05). Results: Conditioning, grouping and the interaction between both, influenced the ΔE* (p<0.0001), which exceeded the 3.3 threshold for visible color change after conditioning of Group C in black coffee. Whitening for 1 week significantly reduced ΔE* in this group. There were no significant changes in surface roughness. Conclusions: Home-whitening did not alter significantly the color of the nanocomposite, except when it was previously stained. One-week whitening was sufficient to recover color change to an acceptable level.

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Section: Discussionsupporting

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Tooth whitening recovers the color of pre-stained composites

et al. 2017

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“…Some studies using these materials reported that these two bleaching systems were able to alter the polishing of composite resins (13), but other studies showed that these materials do not change the surface morphology of composites (2,14).…”

mentioning

confidence: 99%

Changes in surface roughness and color stability of two composites caused by different bleaching agents

et al. 2012

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The objective of this study was to evaluate the effect of two bleaching agents (10% and 35% hydrogen peroxide) on the color stability and surface roughness of two composites, one nanohybrid and one nanoparticle. Specimens were polished, aged, stained, bleached and polished again. The action of the bleaching agents on the composites was analyzed using a profilometer (surface roughness) and a spectrophotometer (color stability). The effect of polishing the composites on the surface roughness and the resumption of the composite color was also evaluated. The results were analyzed statistically by ANOVA and Tukey's test at 5% significance level. The analysis indicated that the nanohybrid composite was more affected by staining. The bleaching agents were not able to promote bleaching of either composite over the evaluation period. Surface polishing returned nanohybrid composite to its original color condition, which did not occur for the nanoparticle composite. Additionally, polishing did not return the surface roughness of either composite to its original value. It may be concluded that polishing surface after bleaching should not be the treatment of choice, as it was not possible to reverse the roughness of the composites to their original values, suggesting that a more extensive and irreversible degradation might have occurred.

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“…(15) With regard to surface properties, some reports have indicated that bleaching agents containing hydrogen peroxide do not affect the surface texture, whereas some others have suggested that bleaching can increase surface roughness. (1,(3)(4)(5)(6)(16)(17)(18)(19)(20) The aim of the present study was to determine the surface roughness of two composite resins, i.e. a nanofilled and a microhybrid one, and to evaluate the role of sealing them with BisCover LV in the efficacy of bleaching with 37.5% hydrogen peroxide.…”

Section: Introductionmentioning

confidence: 99%

“…The in-office bleaching technique, which requires the application of a high percentage of peroxide on teeth, has been reported to result in crack formation and to change surface roughness. (3)(4)(5)(6)(7) Surface penetrating sealants (SPS) are unfilled low-viscosity resins polymerized on composite resin surfaces by capillary action and can maintain surface smoothness and improve wear resistance and marginal sealing of the restoration. BisCover LV is a light-cured resin used to seal restorations.…”

Section: Introductionmentioning

confidence: 99%

An AFM evaluation of the effect of 37.5% hydrogen peroxide on sealed and unsealed aged composite materials

2016

IDJSR

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Objective: The aim of this study was to evaluate the surface roughness of sealed and unsealed composite resins bleached with 37.5% hydrogen peroxide. Materials and Methods: Eight discs, 9 mm in diameter and one mm in thickness, were prepared from two shades (A1) of two composite resins, i.e. Filtek Z250 and Filtek Z350 XT. The specimens were polished and subjected to accelerated aging before bleaching. Half of the surface of each specimen was sealed with BisCover LV. Surface roughness was determined using Atomic Force Microscope (AFM) software before and after bleaching; 37.5% hydrogen peroxide was applied to the specimens for bleaching, and surface roughness was measured with AFM software. Surface roughness was evaluated by three parameters, i.e. roughness profile (Ra), height of the profile (Rz), and width of the profile (Rq). Data were statistically analyzed by two-way repeated measures ANOVA and t-test. Results:The arithmetical mean deviation of the Ra parameter of the specimens did not change significantly after bleaching with 37.5% hydrogen peroxide (P=.450). The mean Rq of the sealed specimens changed significantly after bleaching with 37.5% hydrogen peroxide (P=.002), and the maximum Rz parameter of the sealed and unsealed Filtek Z250 specimens, treated with 37.5% hydrogen peroxide, was significant (P<.005). Conclusions: Bleaching with 37.5% hydrogen peroxide had no significant effect on the nanofilled composite resin (Filtek Z350) and significantly decreased the surface roughness of unsealed Filtek Z250 in Rz parameters. In addition, bleaching of the sealed composite resin with 37.5% hydrogen peroxide resulted in an increase in the Rq parameter and a decrease in the Rz parameter. After bleaching, the sealed composite resin had the least surface roughness.

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Effect of whitening gels on the surface roughness of restorative materials in situ

Cited by 54 publications

References 10 publications

Tooth whitening recovers the color of pre-stained composites

Tooth whitening recovers the color of pre-stained composites

Changes in surface roughness and color stability of two composites caused by different bleaching agents

An AFM evaluation of the effect of 37.5% hydrogen peroxide on sealed and unsealed aged composite materials

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