Shear bond strength and ultrastructural interface analysis of different adhesive systems to bleached dentin

Ferreira, Ernando A.; Souza‐Gabriel, Aline Evangelista; Silva-Sousa, Yara Teresinha Corrêa; Sousa‐Neto, Manoel Damião; Silva, Ricardo G.

doi:10.1002/jemt.20895

Cited by 16 publications

(26 citation statements)

References 26 publications

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“…The bleaching agent used in this study (Opalescence Xtra Boost) contains carotene as lightabsorbing agent and, although this is a chemically activated product, the manufacturer reports that some professionals prefer to activate the bleaching gel using a light source (11). The results of the present study, revealed that bleaching intracoronary dentin with 38% HP was similar to 38% HP activated by LED-laser system.…”

Section: Discussionmentioning

confidence: 51%

“…The clinical performance of resin-based composite restorations after the bleaching procedure can be influenced by possible alterations from presence of bleaching agents in the dental structure (7)(8)(9)(10)(11). Free radicals from oxygen that remain in the dental tissues can inhibit the light activation of resin materials with subsequent reduction in bond strength of resin-based composite restorations (8,11).…”

Section: Effect Of Bleaching Protocols With 38% Hydrogen Peroxide Andmentioning

confidence: 99%

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Effect of bleaching protocols with 38% hydrogen peroxide and post-bleaching times on dentin bond strength

et al. 2011

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This study assessed the effect of bleaching protocols with 38% hydrogen peroxide (HP) and post-bleaching times on shear bond strength of a composite resin to dentin. One-hundred slabs of intracoronary dentin were included and randomly assigned into 2 groups according to the bleaching protocol: HP (2 applications of 10 min each) and HP activated by LED laser (2 applications of 10 min each/45 s of light activation). Groups were subdivided according to the post-bleaching time (n=10): 1 day, 3 days, 7 days, 10 days and 14 days. The control group was unbleached and restored (n=10). The specimens were restored with Single Bond adhesive system/Filtek Z250 resin using a polytetrafluorethylene matrix and were submitted to the shear bond strength testa after 24 h,. Data were analyzed by ANOVA and Tukey's test (α=0.05). Unbleached group (0.283 ± 0.134) had the highest bond strength and was statistically similar (p>0.05) to HP/10 days (0.278 ± 0.064), HP + LED laser/10 days (0.280 ± 0.078), HP/14 days (0.281 ± 0.104), HP + LED laser/14 days (0.277 ± 0.093). Lower bond strength were verified in HP/1 day (0.082 ± 0.012), HP/3 days (0.079 ± 0.013), HP + LED laser/1 day (0.073 ± 0.018) and HP + LED laser/3 days (0.080 ± 0.015), which were statistically similar (p>0.05). HP/7 days (0.184 ± 0.154) and HP + LED laser/7 days (0.169 ± 0.102) had intermediate values (p<0.05). The restorative procedure of intracoronary dentin bleached with 38% HP with or without the use of light source should be performed after at least 10 days after the bleaching treatment.

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Section: Discussionmentioning

confidence: 51%

Section: Effect Of Bleaching Protocols With 38% Hydrogen Peroxide Andmentioning

confidence: 99%

Effect of bleaching protocols with 38% hydrogen peroxide and post-bleaching times on dentin bond strength

et al. 2011

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“…Because of its low molecular weight, this substance can penetrate dentin and can release oxygen that breaks the double bonds of the organic and inorganic compounds inside the dentinal tubules (1,5). It can be used in its pure form or as the final product of the degradation of other bleaching substances, such as carbamide peroxide and sodium perborate (6)(7)(8).…”

Section: Effect Of High-concentrated Bleaching Agents On the Bond Strmentioning

confidence: 99%

Effect of high-concentrated bleaching agents on the bond strength at dentin/resin interface and flexural strength of dentin

et al. 2012

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This study evaluated the effect of bleaching agents on bond strength at the dentin/resin interface and the flexural strength of dentin. Forty maxillary canines were selected for the study. In the shear strength test, 40 slabs of intracoronary dentin (5 x 5 mm) obtained from buccal surfaces of the crowns were included in acrylic resin. In the flexural strength test, 40 dentin bars (8 x 2 x 2 mm) were obtained from the roots. The 40 hemi-sections of the lingual surface were prepared for scanning electron microscopy (SEM). The specimens were divided into 4 groups according to the bleaching protocol (n=10): Unbleached (control), Sodium perborate + 20% hydrogen peroxide (SP + 20% HP), 37% carbamide peroxide (37% CP) and 38% hydrogen peroxide (38% HP). After 7 days, the bond strength specimens were restored and tested. Dentin bars were bleached and subjected to a three-point bending test. Data (MPa) were analyzed by ANOVA and Tukey's test (α=0.05). In the shear test, the control group was superior (p<0.05) to the bleached groups, which, in turn, were statistically similar (p>0.05). In the flexural strength test, the control group also had the highest values and differed significantly from the other groups (p<0.05). SEM revealed smear layer in all groups, with fissures in the bleached specimens. SP + 20% HP and 38% HP showed discontinuous interfaces with few tags. In conclusion, bond strength of restorative material to dentin and flexural strength of dentin were reduced after the use of high-concentration bleaching agents.

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“…[2][3][4] Several studies have assessed the impact of different bleaching agents on mechanical and morphological properties of the bonding interface. [5][6][7][8][9][10] The results of most studies have indicated decreased bond strength of restorative materials to bleached dentin. 7,11,12 Residual free oxygen radicals in the dentinal tubules and in the collagen matrix have been proposed as possible reasons for this reduction in bond strength 7,11,12 since they prevent adequate polymerization of adhesives and composite resin.…”

Section: Introductionmentioning

confidence: 99%

Effect of Er: YAG Laser on Microtensile Bond Strength of Bleached Dentin to Composite

Rezaei

Aliasghar²,

Rezvani

et al. 2019

J Lasers Med Sci

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Introduction: In non-vital tooth bleaching, dentin is in direct contact with the bleaching agent, 1 to 3-week delay is needed to eliminate free radicals from tooth structure. The present study aimed to evaluate the effect of irradiation of Er: YAG laser on immediate microtensile bond strength of bleached dentin to composite. Methods: Sixty sounds human teeth were collected and randomly divided into 4 groups (n=15): no bleaching (NB), opalescence endo hydrogen peroxide (HP) gel bleaching, sodium perborate (SP) bleaching and laser bleaching with heydent gel (LB). The groups were divided into 3 subgroups (n=5): no surface treatment, Er: YAG laser irradiation and 10% sodium ascorbate (SA). All samples were restored and underwent microtensile bond strength testing. Statistical analysis was carried out using one-way and two-way ANOVA. Results: Bond strength in NB-SA group had a significant difference with the NB group (P<0.05) while no significant difference was noted between NB and NB-Er groups (P=0.55). Application of SA and Er: YAG laser after bleaching with SP did not enhance the bond strength (P=0.07). Conclusion: Application of SA and Er: YAG laser after HP gel bleaching significantly enhanced the bond strength. Application of Er: YAG laser after internal bleaching with HP gel could enhance the bond strength.

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Shear bond strength and ultrastructural interface analysis of different adhesive systems to bleached dentin

Abstract: Prompt promoted higher shear bond strength, regardless of the bleaching treatment and allowed the formation of a regular and fine hybrid layer with less deep tags, when compared to Single Bond and Clearfil.

Cited by 16 publications

References 26 publications

Effect of bleaching protocols with 38% hydrogen peroxide and post-bleaching times on dentin bond strength

Effect of bleaching protocols with 38% hydrogen peroxide and post-bleaching times on dentin bond strength

Effect of high-concentrated bleaching agents on the bond strength at dentin/resin interface and flexural strength of dentin

Effect of Er: YAG Laser on Microtensile Bond Strength of Bleached Dentin to Composite

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