Effect of reducing agents on bond strength to NaOCl-treated dentin

Prasansuttiporn, Taweesak; Nakajima, Masatoshi; Kunawarote, Sitthikorn; Foxton, Richard M.; Tagami, Junji

doi:10.1016/j.dental.2010.10.007

Cited by 74 publications

(123 citation statements)

References 33 publications

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“…The clinical implica- tion of this present study is that the application of an antioxidant can shorten the time period spent in the clinic by both dentists and patients to allow restorative procedures to be performed after bleaching treatments. 16 Therefore, the current results do not support full acceptance of the null hypothesis, that the use of SA does not influence the hybrid layer and resin tag formation and the microtensile bond strength in dentin after bleaching.…”

Section: Discussioncontrasting

confidence: 52%

“…11,13,14,[23][24][25] The antioxidant type, concentration, form, and duration of application have been considered important factors for improving bonding after bleaching treatment. [15][16][17]24,25 The reducing capacity or ability to neutralize and reverse the oxidizing effects of hydrogen peroxide in biological systems has already been reported. 26,27 Some authors have suggested that the use of SA after bleaching can reverse the reduced adhesion between adhesive materials and dental tissue.…”

Section: Introductionmentioning

confidence: 99%

“…[8][9][10] It is worth noting that most of the bonding studies have been conducted with resins placed primarily in enamel, 1,7,11,12 while some recent studies evaluated the effect of tooth bleaching on bonding to dentin. 2,[13][14][15][16][17] Most restorative procedures use enamel and dentin as substrates for adhesion.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Sodium Ascorbate on Dentin Bonding After Two Bleaching Techniques

Briso

Rahal

Sundfeld

et al. 2014

Operative Dentistry

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Bleaching with either 10% carbamide peroxide or 35% hydrogen peroxide impairs the formation of the hybrid layer, resin tags, and bond strength. The use of sodium ascorbate following bleaching diminishes this adverse effect in the case of 10% carbamide peroxide but not so when 35% hydrogen peroxide is used as the bleaching agent. SUMMARYThe purpose of this study was to analyze the influence of 10% sodium ascorbate (SA) on the hybrid layer, resin tag length, and bond strength to dentin after bleaching. Six groups were tested: G C, control; G SA, sodium ascorbate (SA) + restoration; G CP, bleaching with carbamide peroxide (CP) + restoration; G CP+SA, bleaching with CP + SA+ restoration; G HP, bleaching with 35% hydrogen peroxide (HP) + restoration; and G HP+SA, HP + SA + restoration. After dental bleaching, the dentin was exposed and the antioxidant solution was applied to groups G SA, G CP+SA, and G HP+SA, before bonding procedures. The teeth were sectioned in the mesiodistal direction. One section was decalcified, and the specimens were embedded in paraffin and sectioned in the longitudinal direction with a thickness of 6 lm. Fifteen slices of each specimen were selected according to a systematic sample of slices with an interval proportional to the total number of slices obtained for each tooth. The specimens were stained using the Brown & Brenn method, and an optic microscope was used to analyze the hybrid layer thickness and resin tag length. The remaining tooth segment was sectioned into stick-shaped specimens and used for microtensile bond strength testing (0.5 mm/min). Statistical analysis was performed using two-way analysis of variance and Fisher test. The results for hybrid layer +

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Section: Discussioncontrasting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

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Effect of Sodium Ascorbate on Dentin Bonding After Two Bleaching Techniques

Briso

Rahal

Sundfeld

et al. 2014

Operative Dentistry

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“…Several previous studies have demonstrated that NaOCl pretreatment on smear layercovered dentin had a negative effect on the bond strength of etch & rinse adhesive systems 22,23) and self-etching adhesive systems 14,24,25) . It has been speculated that remnants of super-oxide radicals generated by NaOCl within the dentin surface inhibit polymerization of resin monomers, resulting in siginificant reduction of bond strength 14,23,24) .…”

Section: Discussionmentioning

confidence: 99%

“…There have been many studies on the pretreatment effect of NaOCl solution on bonding to smear layercovered dentin 11,12,14,[22][23][24][25] . Several previous studies have demonstrated that NaOCl pretreatment on smear layercovered dentin had a negative effect on the bond strength of etch & rinse adhesive systems 22,23) and self-etching adhesive systems 14,24,25) .…”

Section: Discussionmentioning

confidence: 99%

Effect of smear layer treatment on dentin bond of self-adhesive cements

et al. 2012

Self Cite

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The purpose of this study was to compare the dentin bond strength of three self-adhesive cements with smear layer pretreatments using a calcium-chelating agent (EDTA) and deproteinizing solution (NaOCl) and to evaluate their interfacial characteristics. Smear layer-covered dentin surfaces were pretreated with EDTA for 60 s, NaOCl for 5 and 15 s, or none. Three self-adhesive cements; Clearfil SA luting (Kuraray Medical), Rely X Unicem clicker (3M ESPE) and Breeze (Pentron) were applied to the dentin surfaces. After 24-h water storage, shear bond strengths to dentin were determined. In addition, nanoleakage evaluation at the interface was performed using FE-SEM and EDS. EDTA-pretreatment significantly improved the bond strength of BR (p<0.05) and NaOCl-pretreatment for 15 s significantly improved the bond strength of RX (p<0.05). On the other hand, for SA, both pretreatments significantly decreased bond strength to dentin (p<0.05). Nanoleakage formation was observed in various amounts at the cement-dentin interfaces.

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Detection of the hybrid layer biodegradation initiation factor with a scanning electron microscope

Paken

Çömlekoğlu

Sonugelen

2021

Microscopy Res & Technique

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The purpose of this study was to elucidate the origin of initiation of hybrid layer biodegradation. Ninety caries‐free human third molars were divided into three surface groups: enamel, dentin, and NaOCl‐treated dentin. (n = 30/group) Each group was divided into three subgroups (n = 10/group) of luting resin materials with etch‐and‐rinse; self‐etch and self‐adhesive systems. Resin composite blocks and sticks were fabricated and adhered onto dentin and enamel surfaces. The bond strength values were evaluated with micro shear test and statistical analysis were made. On the other hand, teeth were sectioned with a slow‐speed saw into multiple beams. After thermocycling, samples were kept in 50% silver nitrate solution. Samples were analyzed with SEM in back‐scattered mode. According to the micro‐shear bond tests, higher bond strength values were observed in etch‐and‐rinse system. Bond strength values in self‐adhesive and etch‐and‐rinse groups were significantly higher than self‐etch groups in dentin surface and dentin surface treatment with NaOCl. Back‐scattered scanning electron microscope results showed that, different degradation mechanism was observed. The present study indicates that, due to the acid etching in dentin, collagen biodegradation was observed within the hybrid layer. On the enamel surfaces, resin degradation was related with resin monomers in adhesive systems.

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Effect of reducing agents on bond strength to NaOCl-treated dentin

Cited by 74 publications

References 33 publications

Effect of Sodium Ascorbate on Dentin Bonding After Two Bleaching Techniques

Effect of Sodium Ascorbate on Dentin Bonding After Two Bleaching Techniques

Effect of smear layer treatment on dentin bond of self-adhesive cements

Detection of the hybrid layer biodegradation initiation factor with a scanning electron microscope

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