Reversal of Compromised Bonding to Oxidized Etched Dentin

Lai, S.C.N.; Mak, Y.F.; Cheung, Gary S.P.; Osorio, Raquel; Toledano, Manuel; Carvalho, Ricardo Marins de; Tay, Franklin R.; Pashley, David H.

doi:10.1177/00220345010800101101

Cited by 275 publications

(434 citation statements)

References 22 publications

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“…The results revealed that the exposure of dentin to peroxide decreased the bond strength, as reported in several previous studies [15,16,23,27] (Table 1).…”

Section: Discussionsupporting

confidence: 87%

Influence of ascorbic acid on bonding of peroxide-affected dentin and 4-META/MMA-TBB resin

et al. 2006

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The purpose of this study was to evaluate the tensile bond strength to peroxide-exposed dentin. Furthermore, the effect of ascorbic acid on the bond strength of peroxide-exposed dentin was investigated. Extracted bovine dentin was exposed to 10% carbamide peroxide, 30% hydrogen peroxide or distilled water for 30 min, then treated with 10% ascorbic acid (0,30, 90, 180 min), and conditioned with 10% citric acid/3% ferric chloride. The PMMA rod was bonded to the treated bovine dentin with 4-META/MMA-TBB resin. A mini-dumbbell-shaped bonded specimen was prepared from these bonded assemblies and the tensile bond strength was tested. The fractured surfaces were also observed with SEM. Exposure to peroxide before bonding significantly reduced bond strength. The application of ascorbic acid to the peroxide-exposed dentin increased bond strength. On the other hand, an adverse effect of ascorbic acid was found in distilled water-affected dentin.Extended resin fibers were partially seen in the peroxide-exposed dentin. In conclusion, peroxide reduced the bond strength, and the stronger the oxidation, the weaker the obtained bond. Anti-oxidation with ascorbic acid recovered the bond strength, and the effect increased the longer the ascorbic acid was applied.

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“…The results revealed that the exposure of dentin to peroxide decreased the bond strength, as reported in several previous studies [15,16,23,27] (Table 1).…”

Section: Discussionsupporting

confidence: 87%

Influence of ascorbic acid on bonding of peroxide-affected dentin and 4-META/MMA-TBB resin

et al. 2006

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“…In studies carried out by Lai and others, [15][16] it was reported that the bond strength of enamel decreased after bleaching treatment. However, when the bleaching treatment was followed by treatment with sodium ascorbate, bond strength returned to its normal values.…”

Section: Introductionmentioning

confidence: 96%

“…14 However, in order to remove the dissolved peroxide remnants on bleached enamel, it has been demonstrated that the application of a catalase or 10% sodium ascorbate on bleached enamel and dentin immediately after the bleaching treatment makes the above mentioned waiting periods unnecessary. [15][16]26 Parallel to these studies, the current authors have demonstrated in studies that the application of 10% sodium ascorbate solution on bleached enamel and dentin could be an alternative to delayed bonding. [17][18][19][20] In previous studies by the current authors, it was determined that 10% sodium ascorbate solution applied to the enamel surface for 10 minutes increased bond strength on the surface on which it was applied.…”

mentioning

confidence: 93%

Reversal of Compromised Bonding in Bleached Enamel Using Antioxidant Gel

Kaya¹,

Türkün²,

Arici³

2008

Operative Dentistry

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Dental bond strength is significantly reduced when bonding is performed immediately after bleaching treatments. It has also been reported that the application of an antioxidant after bleaching treatment improves the adhesive bond strength of oxidized enamel tissue. The application of an antioxidant in gel form by the patient makes the application process easier and shortens time spent in the clinic. SUMMARYMany studies have shown a considerable reduction in the enamel bond strength of resin composite restorations when the bonding procedure is carried out immediately after bleaching. These studies claim that a certain waiting period is needed prior to performing the restoration in order to attain the original bond strength values. This study determined the most effective time duration for the application of sodium ascorbate prepared in gel form. The labial surfaces of 70 bovine incisors were polished with 600-grit silicon carbide paper on a water-irrigated metallurgical polishing wheel. The specimens were randomly divided into seven groups: 1) bleaching (10% Rembrandt Xtra-Comfort +) immersed in artificial saliva for seven days, 2) bonded immediately after bleaching, 3) bleaching + 10% sodium ascorbate (SA) gel for 10 minutes, 4) bleaching + 10% SA gel for 60 minutes, 5) bleaching + 10% SA gel for 120 minutes, 6) bleaching + 10% SA gel for 240 minutes and 7) bleaching + 10% SA gel for 480 minutes. After preparation, a standardshaped resin composite was applied to all specimens. The teeth were stored in distilled water at 37˚C for 24 hours and a universal testing machine determined their shear bond strength. The data were evaluated using ANOVA and Tukey tests. Antioxidant gel proved to be effective for increasing the shear bond strength of the resin composite to enamel. For maximum effectiveness, antioxidant gel should be applied to enamel for

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“…Sodium ascorbate presents low toxicity and has a neutral pH (approximately 7), being appropriate for use on dental structures without producing undesirable damages (23). The reaction between SA and oxygen into dentin peaks within 1 min and thereafter the reaction reduces considerably (2).…”

Section: Immediate Bonding To Bleached Dentinmentioning

confidence: 99%

Bonding Effectiveness of Universal Adhesive to Intracoronal Bleached Dentin Treated with Sodium Ascorbate

et al. 2016

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This study evaluated the effect of restorative protocol with sodium ascorbate on the shear bond strength (SBS) of a universal adhesive to intracoronal bleached dentin. One hundred-and-twenty bovine dentin fragments were randomly divided into 12 groups (n=10), according to the bleaching procedure (unbleached and bleached) and restorative protocol (no treatment, 10% sodium ascorbate -10SA, 35% sodium ascorbate -35SA and two-step etch-and-rinse -ER or one-step self-etch -SE Scotchbond universal adhesive approaches). Four whitening sessions were performed using 35% hydrogen peroxide. The samples from control groups were kept in relative humidity at 37 °C. Immediately after bleaching procedures, the assigned antioxidant solution was applied on dentin and restorative procedures were performed following either the ER or the SE approach. After 24 h, the specimens were subjected to SBS test. Data (MPa) were analyzed by ANOVA and Tukey's test (α=0.05). Lower SBS values were found for bleached specimens (8.54 MPa) compared with those unbleached (12.13 MPa) (p<0.05). The bond strength of the sodium ascorbate-treated groups was higher than those untreated, regardless of the strategy employed (p<0.05). Groups restored without sodium ascorbate showed lower bond strength values for both ER (8.32 MPa) and SE (8.28 MPa) adhesive strategies. The group treated with 10SA submitted to ER approach (10.14 MPa) was similar to untreated groups (p>0.05). It may be concluded that bond strength of composite resin to intracoronal dentin was affected by restorative protocol and reduced by bleaching.

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Reversal of Compromised Bonding to Oxidized Etched Dentin

Cited by 275 publications

References 22 publications

Influence of ascorbic acid on bonding of peroxide-affected dentin and 4-META/MMA-TBB resin

Influence of ascorbic acid on bonding of peroxide-affected dentin and 4-META/MMA-TBB resin

Reversal of Compromised Bonding in Bleached Enamel Using Antioxidant Gel

Bonding Effectiveness of Universal Adhesive to Intracoronal Bleached Dentin Treated with Sodium Ascorbate

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