Thirty-five percent carbamide peroxide application causes in vitro demineralization of enamel

Efeoglu, Neslihan; Wood, David; Efeoğlu, Candan

doi:10.1016/j.dental.2006.06.032

Cited by 88 publications

(66 citation statements)

References 13 publications

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“…In addition, in enamel treated with hydrogen peroxide, a groove was observed which appeared to be an eroded enamel rod sheath, suggesting that peroxide affects the organic constituentsofenamel 21,26,27) . Decalcification has been reported in enamel treated with carbamide peroxide withapHof6.7-6.8,whichishigherthanthecritical pH 28,29) . Decalcification and morphological change in the enamel resulted from the increased surface roughness of the enamel brought about by peroxide treatment [8][9][10][11] .…”

Section: Surface Morphology and Roughnessmentioning

confidence: 99%

Influence of peroxide treatment on bovine enamel surface-Cross-sectional analysis-

et al. 2009

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Carbamide peroxide and hydrogen peroxide are used as the main agents in vital tooth bleaching. In this study, the influence ofperoxidetreatmentoncross-sectionalmorphologyandmechanicalpropertywasinvestigated.A3×5-mmwindowofenamel onthelabialsurfaceofabovinetoothwasexposedtoimmersionin10%or30%carbamideperoxideorhydrogenperoxidefor 30or180min.Afterimmersion,thecross-sectionalstructureofeachspecimenwasexaminedbynanoindentationandSEM. Nanohardnessintheenamelshowedadecreaseat2µmbelowthesurface,butnoneat50µm.Highconcentrationsofperoxide causederosiontoadepthof5μmbelowthesurface.Inconclusion,decreaseinnanohardnessandchangeinmorphologywere limitedtoanarealessthan50µmbelowthesurface,regardlessofeitherconcentrationofperoxideorperiodofimmersion.

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Section: Surface Morphology and Roughnessmentioning

confidence: 99%

Influence of peroxide treatment on bovine enamel surface-Cross-sectional analysis-

et al. 2009

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“…[1][2][3][4][5] Studies that investigated the effect of bleaching gels on enamel microhardness using the in-office technique are scarce and the results have been controversial. Oltu and Gürgan 6 observed a reduction in enamel microhardness when 35% carbamide peroxide bleach was used; nevertheless, phosphoric acid was applied onto the enamel before the bleaching agent, which could affect the results.…”

Section: Introductionmentioning

confidence: 99%

Influence of Potentially Remineralizing Agents on Bleached Enamel Microhardness

Borges¹,

Samezima²,

Fonseca³

et al. 2009

Operative Dentistry

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SUMMARYThis study investigated the effect of the addition of calcium and fluoride into a 35% hydrogen peroxide gel on enamel surface and subsurface microhardness. Twenty extracted human third molars were sectioned to obtain enamel fragments and they were divided into four groups (n=20) according to the bleaching treatment. Group 1 received no bleaching procedure (control). Group 2 was treated with a 35% hydrogen peroxide gel (Total Bleach), Groups 3 and 4 were bleached with Total Bleach modified by the addition of sodium fluoride and calcium chloride, respectively. The microhardness of the enamel surface was assessed using a Vickers microdurometer immediately after the bleaching treatment. The specimens were sectioned in the central portion, polished and evaluated to determine the microhardness of the enamel subsurface to a depth of 125 µm, with an interval of 25 µm between measures. There were significant differences among the groups. In terms of surface microhardness, the bleached group exhibited the lowest means, and the calcium-modified bleached group exhibited the highest means. Regarding subsurface microhardness, there were no significant differences among the groups for the depth and interaction factors. The bleached group exhibited the lowest means, and the calcium-modified bleached group presented the highest means. It was concluded that the bleaching treatment with 35% hydrogen peroxide significantly reduced the surface and subsurface microhardness of the enamel, and the addition of Clinical RelevanceDentists should be aware of the enamel demineralization potential of 35% hydrogen peroxide. The addition of fluoride and calcium can enhance remineralization of surface and subsurface bleached enamel.fluoride and calcium in the bleaching agent increased the microhardness means of the bleached enamel.

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“…Whereas when application of 35% carbamide peroxide occurred, there was a significant reduction in the mineral content of enamel specimens postbleach application extending to a depth of 250 µm, mineral content reduction was greatest in the area closest to the tooth surface. However, no significant difference was found in the mineral content of dentin as a consequence of bleaching (Efeoglu et al, 2005;Efeoglu et al, 2007).…”

Section: Mineral Concentrations Of Teethmentioning

confidence: 79%

State of the Art of Micro‐CT Applications in Dental Research

2009

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This review highlights the recent advances in X-ray microcomputed tomography (Micro-CT) applied in dental research. It summarizes Micro-CT applications in measurement of enamel thickness, root canal morphology, evaluation of root canal preparation, craniofacial skeletal structure, micro finite element modeling, dental tissue engineering, mineral density of dental hard tissues and about dental implants. Details of studies in each of these areas are highlighted along with the advantages of Micro-CT, and finally a summary of the future applications of Micro-CT in dental research is given.

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Thirty-five percent carbamide peroxide application causes in vitro demineralization of enamel

Cited by 88 publications

References 13 publications

Influence of peroxide treatment on bovine enamel surface-Cross-sectional analysis-

Influence of peroxide treatment on bovine enamel surface-Cross-sectional analysis-

Influence of Potentially Remineralizing Agents on Bleached Enamel Microhardness

State of the Art of Micro‐CT Applications in Dental Research

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