Effects of Two Antioxidants on the Microleakage of Resin-Based Composite Restorations after Nonvital Bleaching

Moosavi, Horieh; Moghaddas, Mohammad; Ghoddusi, Jamileh; Rajabi, Omid

doi:10.5005/jcdp-11-6-33

Cited by 18 publications

(24 citation statements)

References 20 publications

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“…In addition, unlike previous studies in which 10% CP was used for nonvital bleaching,5,6 the use of a stronger bleaching agent, a mixture of 30% HP and sodium perborate, could be another factor in the delayed antioxidant effect of SA. Although the association of sodium perborate with 30% HP can be more effective in lightening tooth color, it may affect bonding more adversely due to the high concentration of peroxide.…”

Section: Discussionmentioning

confidence: 87%

“…It has been reported that the application of sodium ascorbate (SA) antioxidant into the access cavity of intracoronally-bleached tooth allows immediate composite restoration after nonvital bleaching through its ability to remove oxygen radicals 4,5. Notwithstanding the proven efficacy of SA application for the purpose, its effective application duration remains controversial.…”

Section: Introductionmentioning

confidence: 99%

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Effective application duration of sodium ascorbate antioxidant in reducing microleakage of bonded composite restoration in intracoronally-bleached teeth

2013

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ObjectivesThe aim of this study was to determine an appropriate application duration of sodium ascorbate (SA) antioxidant gel in reducing microleakage of bonded composite restoration in intracoronally-bleached teeth.Materials and MethodsEighty endodontically-treated human incisors were randomly divided into eight groups: control, no bleaching; IB and DB, immediate and delayed bonding after bleaching, respectively; S10m, S60m, S24h, S3d and S7d, bleaching + SA gel for 10 min, 60 min, 24 hr, 3 day and 7 day, respectively. For bleaching, a mixture of 30% hydrogen peroxide and sodium perborate was applied for 7 day. All access cavities were restored using One-Step adhesive (Bisco Inc.) and then Aelite LS Packable composite (Bisco Inc.). The bonded specimens were subjected to 500 thermal cycles, immersed in 1% methylene blue for 8 hr, and longitudinally sectioned. Microleakage was assessed with a 0 - 4 scoring system and analyzed using nonparametric statistical methods (α = 0.05).ResultsGroup IB showed a significantly higher microleakge than the control group (p = 0.006) and group DB a statistically similar score to the control group (p > 0.999). Although groups S10m, S60m, and S24h exhibited significantly higher scores than group DB (p < 0.05), the microleakage in groups S3d and S7d was statistically similar to that in group DB (p = 0.771, p > 0.999).ConclusionsApplication of SA gel for 3 day after nonvital bleaching was effective in reducing microleakage of composite restoration in intracoronally-bleached teeth.

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Section: Discussionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Effective application duration of sodium ascorbate antioxidant in reducing microleakage of bonded composite restoration in intracoronally-bleached teeth

2013

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“…Recently, a biocompatible and neutral antioxidant, 10% sodium ascorbate, was shown to be able to remove the residual peroxide and oxygen, so that compromised bonding to bleached tooth structures, such as dentin or enamel, could be reversed. [15][16][17] Furthermore, Moosavi et al [5] demonstrated that the addition of surfactant (0.2% Tween ® 80) to a sodium ascorbate formulation could signifi cantly reduce the microleakage after nonvital bleaching. To our knowledge, only one study [18] has investigated the use of catalase in improving the composite-resin bond strength after tooth bleaching.…”

Section: Effects Of Antioxidants On the Microleakage Of Composite Resmentioning

confidence: 99%

Effects of antioxidants on the microleakage of composite resin restorations after external tooth bleaching

Han

Jiang

et al. 2014

Eur J Dent

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Objective:To compare the effects of three antioxidants (sodium ascorbate, sodium ascorbate combined with a surfactant, and catalase) on the microleakage of composite resin restorations after external tooth bleaching with 10% carbamide peroxide.Materials and Methods:Buccal cavities were prepared on the surface of 60 intact premolars, which were randomly divided into six groups. All cavities were filled with composite resin. In group 1, teeth were not bleached; in group 2, cavities were filled immediately after bleaching; in group 3, cavities were delay-filled for 3 weeks; in group 4, cavities were treated with sodium ascorbate after bleaching and then filled; in group 5, cavities were treated with sodium ascorbate combined with surfactant after bleaching and then filled; and in group 6, cavities were treated with catalase after bleaching and then filled. Microleakage of the restorations was measured from sections using a stereomicroscope.Results:Group 1 displayed the least amount of microleakage, while group 2 showed the greatest amount of microleakage (P < 0.05). Groups 3 and 4 were similar to group 2 (P > 0.05). However, groups 5 and 6 showed a significantly lower amount of microleakage compared to group 2 (P < 0.05).Conclusion:Microleakage increased significantly after external bleaching with 10% carbamide peroxide, and decreased when the bleached teeth were treated with sodium ascorbate combined with Tween® 80, or with catalase. Catalase was more effective in decreasing microleakage, while delayed filling or treatment with sodium ascorbate alone did not effectively decrease the microleakage.

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“…Moosavi et al. (44) used this method to evaluate the effect of two antioxidants on leakage during a bleaching procedure. They also compared the results obtained with the electrochemical method with similar results obtained on the same teeth using 0·5% basic fuchsin dye penetration over 24 h and the evaluation of sections at 16× magnification.…”

mentioning

confidence: 99%

Prediction and diagnosis of clinical outcomes affecting restoration margins

Dennison

Sarrett

2011

J of Oral Rehabilitation

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The longevity of dental restorations is largely dependent on the continuity at the interface between the restorative material and adjacent tooth structure (the restoration margin). Clinical decisions on restoration repair or replacement are usually based upon the weakest point along that margin interface. Physical properties of a restorative material, such as polymerisation shrinkage, water sorption, solubility, elastic modulus and shear strength, all have an effect on stress distribution and can significantly affect margin integrity. This review will focus on two aspects of margin deterioration in the oral environment: the in vitro testing of margin seal using emersion techniques to simulate the oral environment and to predict clinical margin failure and the relationship between clinically observable microleakage and secondary caries. The many variables associated with in vitro testing of marginal leakage and the interpretation of the data are presented in detail. The most recent studies of marginal leakage mirror earlier methodology and lack validity and reliability. The lack of standardised testing procedures makes it impossible to compare studies or to predict the clinical performance of adhesive materials. Continual repeated in vitro studies contribute little to the science in this area. Clinical evidence is cited to refute earlier conclusions that clinical microleakage (penetrating margin discoloration) leads to caries development and is an indication for restoration replacement. Margin defects, without visible evidence of soft dentin on the wall or base of the defect, should be monitored, repaired or resealed, in lieu of total restoration replacement.

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Effects of Two Antioxidants on the Microleakage of Resin-Based Composite Restorations after Nonvital Bleaching

Cited by 18 publications

References 20 publications

Effective application duration of sodium ascorbate antioxidant in reducing microleakage of bonded composite restoration in intracoronally-bleached teeth

Effective application duration of sodium ascorbate antioxidant in reducing microleakage of bonded composite restoration in intracoronally-bleached teeth

Effects of antioxidants on the microleakage of composite resin restorations after external tooth bleaching

Prediction and diagnosis of clinical outcomes affecting restoration margins

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