Oxygen release, microleakage and shear bond strength of composite restorations after home dental bleaching

Oliveira, Marcelo Tomás de; Andrade, Mauro Amaral Caldeira de; Michels, M.A.J.

doi:10.1590/s1980-65232011000100011

Cited by 8 publications

(10 citation statements)

References 2 publications

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“…Thus, bleaching could affect the dental substrate. Application of different whitening techniques in restored teeth may represent another risk: it can weaken the bond at the tooth-restoration interface [20,21].…”

Section: Discussionmentioning

confidence: 99%

Tooth whitening affects bond strength of adhesive systems in enamel

Neto

Silva

et al. 2018

Matéria (Rio J.)

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This study presents how the tooth whitening affects the bond strength and fracture type of three distinct adhesivesa conventional, a self-etching, and a universal adhesivein enamel. Health bovine incisors were prepared by flattening the labial surface; part of these teeth was submitted to whitening treatment with a peroxide-based product (WhiteGold Office © 35%). The Single Bond © , AdheSE © , or Single Bond Universal © adhesive system were used to adhere a block of restorative resin to the flat surface of the teeth. Sticks measuring 10x1x1 mm were prepared and used in microtensile tests; they were also employed to examine the type of fracture. The results are analyzed with a two-way ANOVA. For both whitened and non-whitened specimens, the adhesive systems did not give statistically different bond strength values. However, the fracture shape (classified into four types) varied from a cohesive enamel type fracture for the whitened samples to a predominantly cohesive resin type fracture for the non-whitened teeth. Therefore, the whitening procedure has exerted a weakening effect on enamel even after 21 days post-treatment.

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Section: Discussionmentioning

confidence: 99%

Tooth whitening affects bond strength of adhesive systems in enamel

Neto

Silva

et al. 2018

Matéria (Rio J.)

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“…These results are in accordance with additional studies 20,21 . Bleaching agents may negatively influence the bond strength of resin composites in the dentin [22][23][24] . During bleaching, reactive oxygen radicals are released, changing the physical properties of the tooth-restoration interface 24 .…”

Section: Discussionmentioning

confidence: 99%

The effect of a bleaching agent on the pigment removal and the bond strength of bulk-fill resin composites: an in vitro study

Charamba

Lima

Meireles

et al. 2018

Rev. odontol. UNESP

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Introduction In order to simplify the technique, reduce the time required for direct adhesive restorations, bulk-fill resin composites have been developed be applied in bulk placement up to 4 mm increments. Objective Evaluating the color change (ΔE) and the microtensile bond strength (μTBS) of bulk fill resin composites (BFRC) to dentin after the immersion in regular beverages and the application of bleaching systems. Method Forty-five human molar teeth were randomly distributed in three groups according to the filling material (n=15): Filtek Bulk Fill, Tetric N Ceram Bulk Fill and Filtek Z100. The restored teeth were immersed in coffee, wine and distilled water (n=5) for 72 hours. The color parameters were measured using a spectrophotometer, having as basis the CIE L*a*b*, before and after tooth staining and application of bleaching processes. Subsequently, the teeth were sectioned to obtain the specimens for the microtensile testing. The ΔE values were analyzed applying the Kruskal-Wallis and the Wilcoxon tests, and the μTBS values were analyzed applying the ANOVA and the Bonferroni tests (p<0.05). Result There were no significant differences in the ∆E values when comparing the BFRCs to the conventional resin composite (CRC) in most of the experimental groups. The ∆E values did not present significant differences before and after the application of bleaching processes for all the tested resin composites. The BFRCs presented higher μTBS values than the CRC after exposure to distilled water, wine and bleaching agent. Conclusion The studied BFRCs presented similar color stability to the CRC. The BFRCs presented higher bond strength to the dentin than the CTC in most of the evaluated conditions. The bleaching agent was not effective in whitening the stained restored teeth.

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“…During bleaching, hydrogen peroxide (HP) ionizes to release free radicals and nascent oxygen, which break down the larger chromogenic pigments to smaller less intensive ones thereby lightening the color of the tooth (Bernardon et al, 2010). However, the clinician faces multiple challenges when composite restorations are to be done immediately following bleaching (Teixeira et al, 2003;Jacob and Dhanya Kumar, 2007;de Oliveira et al, 2011). HP causes deleterious effects on the enamel by oxidizing the organic and inorganic components of the latter.…”

Section: Introductionmentioning

confidence: 99%

“…The marginal integrity of composite restorations is also compromised when they are used immediately as permanent restorations in access cavities of teeth subjected to intracoronal bleaching. Loss of marginal integrity opens up a microscopic gap between the tooth and the restoration, leading to a cascade of events that ultimately result in failure of the restoration (Teixeira et al, 2003;Jacob and Dhanya Kumar, 2007;de Oliveira et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Marginal integrity of aesthetic restorations following intracoronal bleaching with sweet potato extract as an additive: An SEM study

Gurucharan

Vidhya

Mahalaxmi

2020

Heliyon

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A B S T R A C TThe aim of this in vitro study was to evaluate the marginal integrity of an alkasite restoration in comparison to that of a conventional composite resin restoration following intra-coronal bleaching with 30% hydrogen peroxide (HP) containing sweet potato extract (SPE) as an additive. Access cavities were prepared in 60 extracted human incisors. The teeth were decoronated 2mm below the CEJ and the pulp chambers were sealed cervically. The samples were divided into two groups (n ¼ 30) based on the type of restorative material -group I: Hybrid composite resin and group II: Alkasite restorative material. Both the groups were divided into three subgroups (n ¼ 10) based on the intra-coronal bleaching agent used namely, subgroup A: no bleaching (NB); subgroup B: 30% hydrogen peroxide (HP) and subgroup C: 30% hydrogen peroxide containing SPE (HSP). The tooth-restorative interface was observed under a scanning electron microscope (SEM) to determine the marginal integrity. The results were tabulated and statistically analyzed using one-way ANOVA. Specimens bleached with HP alone showed higher marginal gaps, irrespective of the restorative material used. Subgroups A and C showed lesser marginal gaps under both the restorative materials. An improved marginal integrity was seen with the alkasite material. It can be concluded that the addition of SPE to HP improves the marginal integrity of the coronal restorative material placed immediately post-bleaching. The new alkasite material holds promise as a permanent coronal seal in cases of intra-coronal bleaching.

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Oxygen release, microleakage and shear bond strength of composite restorations after home dental bleaching

Cited by 8 publications

References 2 publications

Tooth whitening affects bond strength of adhesive systems in enamel

Tooth whitening affects bond strength of adhesive systems in enamel

The effect of a bleaching agent on the pigment removal and the bond strength of bulk-fill resin composites: an in vitro study

Marginal integrity of aesthetic restorations following intracoronal bleaching with sweet potato extract as an additive: An SEM study

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