Effect of surface treatments on staining and roughness of bleached enamel

Monteiro, Débora; Valentim, P. T.; Elias, D. C.; Moreira, Allyson Nogueira; Cornacchia, Tulimar Pereira Machado; Magalhães, Cláudia Silami de

doi:10.4103/ijdr.ijdr_233_16

Cited by 14 publications

(22 citation statements)

References 24 publications

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“…Bleaching effectiveness as well as the changes caused on enamel surface and side effects depends mainly on relationship established between the concentration of gel and its time of use, and may also be influenced by diffusion capacity of bleaching agent and its pH ( 4 - 6 , 9 , 11 , 14 ). The pH can change not only the bleaching efficacy, but it can also reduce the hardness, increase the roughness and cause the wear of tooth enamel ( 6 , 13 , 20 ). In addition to factors associated with bleaching gels, there is also a concern with the patients’ diet, as excessive exposure to alcohol, food, and acidic drinks can generate deleterious effects on enamel surface when used frequently during the bleaching treatment and the literature shows the need to be cautious when indicating treatment for patients with dentin hypersensitivity ( 11 - 13 , 20 ).…”

Section: Introductionmentioning

confidence: 99%

“…The pH can change not only the bleaching efficacy, but it can also reduce the hardness, increase the roughness and cause the wear of tooth enamel ( 6 , 13 , 20 ). In addition to factors associated with bleaching gels, there is also a concern with the patients’ diet, as excessive exposure to alcohol, food, and acidic drinks can generate deleterious effects on enamel surface when used frequently during the bleaching treatment and the literature shows the need to be cautious when indicating treatment for patients with dentin hypersensitivity ( 11 - 13 , 20 ).…”

Section: Introductionmentioning

confidence: 99%

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Effect of bleaching agents on hardness, surface roughness and color parameters of dental enamel

et al. 2020

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Background In this study was evaluated the effect of carbamide peroxide (CP) and hydrogen peroxide (HP) in different concentrations on hardness, roughness, and color parameters (color change - ΔE, lightness - ΔL, and yellow-blue axis - Δb) of bovine teeth. Material and Methods Fifty square dental blocks (7 x 7 x 2 mm) were submitted to initial readings of Knoop hardness, surface roughness (Ra), and color parameters. Specimens were divided into 5 groups (n = 10): control group was kept in artificial saliva during the experimental period; CP 20% was bleached for 2 h daily for 14 days, HP 9.5% was bleached for 30 min daily for 14 days, HP 38% the bleaching gel was applied for 15 min, gel was removed and it was reapplied for two more times, the bleaching session was repeated for another 2 times every 7 days, totaling three sessions, and in CP 45% three sessions of 30 min each were performed of 7 in 7 days. All groups after the bleaching procedures had the bleaching gel removed, washed, and kept in artificial saliva. At the end of bleaching treatment, the hardness, roughness, and color parameters (ΔE, ΔL, and Δb) were re-evaluated. Data were analyzed by ANOVA, Tukey, and Dunnett tests (α = 0.05). Results Bleaching promoted a reduction in hardness, the CP 45% showed the lowest hardness and the CP 20% the highest, the HP 9.5% and HP 38% showed intermediate values of hardness. Bleaching agents did not affect the roughness. CP 20% and HP 38% promoted the highest values of ΔE and higher reduction of yellowish tone of tooth. Lightness increase after bleaching treatment for all groups. Conclusions All the bleaching agents tested showed effectiveness, but with reduced hardness. Key words: Carbamide peroxide, hydrogen peroxide, tooth whitening, hardness, roughness.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of bleaching agents on hardness, surface roughness and color parameters of dental enamel

et al. 2020

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“…A recent study demonstrated that surface treatments (2% neutral sodium fluoride, CPP-ACPF, PVP-containing rinse, and polishing with feltrum disks impregnated with aluminum oxide) were similar to artificial saliva and did not affect bleached enamel color maintenance 17 . These findings partially corroborate with the present study.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the effect of tooth polishing on color stability after in-office bleaching treatment

Espíndola-Castro

Celerino

Nascimento

et al. 2020

Rev. odontol. UNESP

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Introduction One of the most commonly used corrective methods for staining teeth is tooth bleaching. However, subclinical alterations may occur in the micromorphology of dental tissues during the bleaching procedure, such as increases in porosity and surface roughness. Consequently, dental enamel may become more permeable and susceptible to staining. Objective To evaluate the influence of tooth polishing after in-office bleaching treatment on color stability. Material and method Thirty-three extracted human molars were used. The teeth were cut in the mesiodistal direction to obtain two samples per tooth (total of 66). The samples were randomly divided into six groups (n=11). Before and after the bleaching treatment, the lightness of the samples and change in lightness (∆L) were determined with a digital spectrophotometer (Easy Shade). The samples were bleached with 35% hydrogen peroxide (three sessions weekly). Three groups were submitted to polishing with felt discs and polishing paste after each session. To simulate the oral conditions during the consumption of colored beverages, the samples were submitted to alternating cycles of immersion in staining solutions (coffee, red wine, and Coca Cola). Result Polishing resulted in an increase of mean lightness of 4.49 in the red wine group, 2.73 in the coffee group, and 4.08 in the cola group. The difference was significant in the red wine group (p<0.022), but not in the coffee or cola group. Conclusion Polishing after in-office bleaching using felt discs and polishing paste can reduce the degree of pigment impregnation in patient with red wine rich diet.

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“…The free radicals produced during bleaching penetrate within the interprismatic regions and react with pigmented molecules and the organic matrix of the enamel, increasing the surface irregularity of this enamel 18 . The increased surface roughness after bleaching facilitates the staining of teeth and restorative materials by the adhesion of dye pigments and microorganisms 19,20 , which causes great concern to both professionals and patients.…”

Section: Discussionmentioning

confidence: 99%

“…Despite the increased values of tooth enamel roughness observed in the bleaching technique with gel associated with the violet LED, it is difficult to affirm whether such changes are clinically reversible or not. This study was performed in vitro and perhaps the presence of saliva, fluorides, or other remineralizing solutions would have maintained a balance between the processes of demineralization and remineralization 26 , minimizing the adverse effects of tooth bleaching 19,27 . Thus, in vivo studies are required to understand the effects of bleaching agents associated with a violet LED on tooth enamel.…”

Section: Discussionmentioning

confidence: 99%

Effect of violet led associated with low-concentration hydrogen peroxide on enamel surface roughness

et al. 2020

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Aim: The present study aimed to assess in vitro the effect ofviolet LED in tooth bleaching techniques associated or not withlow-concentration hydrogen peroxide gel on enamel surfaceroughness. Methods: Fifty-two enamel fragments of bovineteeth were flattened and polished (4x4x3 mm) and dividedinto four groups according to bleaching treatment: VL- VioletLED; HP- 7.5% hydrogen peroxide; HP+VL- 7.5% hydrogenperoxide + violet LED; C- No bleaching (control). Before thetreatments, all specimens were immersed in 20 mL of blacktea for six days, changing solutions every 24 h to simulatethe staining of specimens. Forty fragments were used toanalyze surface roughness (n=10) and 12 fragments wereused for the morphological analysis (SEM) (n=3). Results:The data were submitted to one-way ANOVA and a post-hocTukey test. The lower roughness values was observed for thegroup that did not receive bleaching treatment (C), differingsignificantly only from the group bleached with 7.5% hydrogenperoxide + violet LED (HP+VL) (p=0.0077). The remaininggroups did not show significant differences in roughnessvalues (p>0.05). The scanning electron microscopy analysisshowed irregularities on the enamel surface regardless ofthe treatment received. Conclusion: The results showedthat bleaching treatments with violet LED associated withlow-concentration hydrogen peroxide gels (7.5%) increasethe surface roughness of tooth enamel.

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Effect of surface treatments on staining and roughness of bleached enamel

Cited by 14 publications

References 24 publications

Effect of bleaching agents on hardness, surface roughness and color parameters of dental enamel

Effect of bleaching agents on hardness, surface roughness and color parameters of dental enamel

Evaluation of the effect of tooth polishing on color stability after in-office bleaching treatment

Effect of violet led associated with low-concentration hydrogen peroxide on enamel surface roughness

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