<i>In vitro</i> peroxide penetration into the pulp chamber from newer bleaching products

Gökay, Osman; Müjdeci, Arzu; Algın, Evren

doi:10.1111/j.1365-2591.2005.00979.x

Cited by 62 publications

(61 citation statements)

References 17 publications

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“…14 Despite the occurrence of the diffusion of the bleaching subproducts through the dentin, 22,23 the radicals present on the dentin are probably incapable of affecting the curing of the resin adhesives, reducing the bond strength.…”

Section: Discussionmentioning

confidence: 99%

Effect of Tooth Bleaching on Bond Strength of Enamel-Dentin Cavities Restored With Silorane- and Dimethacrylate-based Materials

Lima

Sasaki²,

Araújo³

et al. 2011

Operative Dentistry

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Clinical RelevancePrior bleaching treatment, with both low and high concentrations of bleaching agents, does not affect the push-out bond strength of dimethacrylate-and silorane-based materials to enamel-dentin cavities. SUMMARYThe aim of this study was to evaluate the influence of tooth bleaching on the push-out bond strength of a composite resin based on dimethacrylates and silorane to cavities that involve both enamel and dentin. A total of 80 bovine incisors were sectioned on the buccal surface to obtain specimens (10 3 10 mm) presenting enamel and dentin (1-mm thick . After treatment, cavities were made (1.2-mm diameter on dentin; 1.5-mm diameter on enamel) with a diamond bur. At 24 hours after restoration, a push-out bond strength test was performed at a crosshead speed of 0.5 mm/min. The bleaching treatments did not significantly affect the bond strengths of either restorative system to enamel-dentin. Regardless of the bleaching treatment, the dimethacrylate-based resin system exhibited significantly higher bond strengths to enamel-dentin than did the silorane-based system.

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Section: Discussionmentioning

confidence: 99%

Effect of Tooth Bleaching on Bond Strength of Enamel-Dentin Cavities Restored With Silorane- and Dimethacrylate-based Materials

Lima

Sasaki²,

Araújo³

et al. 2011

Operative Dentistry

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show abstract

“…Nevertheless, doses of 10 and 15 J/cm 2 were not capable of producing any effect on the activity of the protein evaluated. These results may be explained, at least in part, by a specific phenomenon known as "biphasic dose response" or "hormesis" (the Arndt-Schulz law) [42].…”

Section: +mentioning

confidence: 99%

“…Since the tooth-bleaching process is mediated by ROS, which can diffuse through the enamel and dentin, reaching the pulp space [2], these aesthetic procedures can promote pulp alterations, such as mild inflammation or even partial necrosis [3][4][5]. Due to the deleterious effects caused by components of bleaching agents, which have been demonstrated in both in vitro [6][7][8][9][10] and in vivo studies [3,5,11], the evaluation of other bleaching techniques that can prevent or reduce pulp damage is needed.…”

Section: Introductionmentioning

confidence: 99%

Effect of low-level laser therapy on odontoblast-like cells exposed to bleaching agent

et al. 2013

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The aim of the present study was to evaluate the effect of low-level laser therapy (LLLT) on odontoblast-like MDPC-23 cells exposed to carbamide peroxide (CP 0. 01 %-2.21 μg/mL of H 2 O 2 ). The cells were seeded in sterile 24-well plates for 72 h. Eight groups were established according to the exposure or not to the bleaching agents and the laser energy doses tested (0, 4, 10, and 15 J/cm 2 ). After exposing the cells to 0.01 % CP for 1 h, this bleaching solution was replaced by fresh culture medium. The cells were then irradiated (three sections) with a near-infrared diode laser (InGaAsP-780±3 nm, 40 mW), with intervals of 24 h. The 0.01 % CP solution caused statistically significant reductions in cell metabolism and alkaline phosphate (ALP) activity when compared with those of the groups not exposed to the bleaching agent. The LLLT did not modulate cell metabolism; however, the dose of 4 J/cm 2 increased the ALP activity. It was concluded that 0.01 % CP reduces the MDPC-23 cell metabolism and ALP activity. The LLLT in the parameters tested did not influence the cell metabolism of the cultured cells; nevertheless, the laser dose of 4 J/cm 2 increases the ALP activity in groups both with and without exposure to the bleaching agent.

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“…Low-concentration HP (15-20%) gels for in-office therapy provide effective bleaching associated with less intense and prevalent tooth sensitivity (5,6). The CP-based gels have the advantage of promoting a slow and gradual release of HP, which prevents its quick diffusion through enamel and dentin at high concentrations (7). The 10% CP gel has been considered a safe bleaching technique for tooth structure, since several studies demonstrated low incidence of post-operative sensitivity (8) and low trans-enamel and trans-dentinal cytotoxicity (4).…”

Section: Introductionmentioning

confidence: 99%

Mineral Loss and Morphological Changes in Dental Enamel Induced by a 16% Carbamide Peroxide Bleaching Gel

et al. 2013

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The aim of this study was to compare the effect of a 16% carbamide peroxide (CP) gel and a 10% CP gel on mineralized enamel content and morphology. Enamel blocks from bovine incisors were subjected to a 14-day treatment (8 h/day) with 10% or 16% CP gels. Knoop microhardness was evaluated before bleaching and at 1, 7 or 14 days after this treatment (50 g/15 s). Mineral content (energy-dispersive x-ray spectroscopy), surface roughness and topography (atomic force microscopy) were evaluated at the 14-day period. Data were analyzed statistically by two-way ANOVA and Tukey's test (α=0.05). Significant microhardness reduction was observed at the 7 th and 14 th days for 10% CP gel, and for all bleaching times for 16% CP gel (p<0.05). At the 14-day period, a significant decrease in Ca and P content, increase on surface roughness (p<0.05) as well as on picks and valleys distance were observed when both bleaching gels were used. These enamel alterations were more intense for 16% CP gel. It was concluded that both CP-based gels promoted loss of mineral structure from enamel, resulting in a rough and porous surface. However, 16% CP gel caused the most intense adverse effects on enamel.

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In vitro peroxide penetration into the pulp chamber from newer bleaching products

Abstract: The peroxides from the whitening strip and paint-on whiteners penetrated into the pulp chamber to varying degrees.

Cited by 62 publications

References 17 publications

Effect of Tooth Bleaching on Bond Strength of Enamel-Dentin Cavities Restored With Silorane- and Dimethacrylate-based Materials

Effect of Tooth Bleaching on Bond Strength of Enamel-Dentin Cavities Restored With Silorane- and Dimethacrylate-based Materials

Effect of low-level laser therapy on odontoblast-like cells exposed to bleaching agent

Mineral Loss and Morphological Changes in Dental Enamel Induced by a 16% Carbamide Peroxide Bleaching Gel

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