Efficacy of microtensile versus microshear bond testing for evaluation of bond strength of dental adhesive systems to enamel

Zohairy, Ahmed A. El; Saber, Mohamed H.; Abdalla, Ali; Feilzer, Albert J.

doi:10.1016/j.dental.2010.04.010

Cited by 62 publications

(66 citation statements)

References 25 publications

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“…Analysis of the bond interface revealed that most failures in the investigated groups affected the enamelresin interface, consistent with the literature. 15,17 The data of the present study corroborate the findings in the literature, 15,17 indicating that most failures in microtests are of the adhesive mode, which ensures bond strength results more appropriate to the dental substrate.…”

supporting

confidence: 90%

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Can Whitening Strips interfere with the Bond Strength of Composite Resins?

Firoozmand

Reis

Vieira

et al. 2015

The Journal of Contemporary Dental Practice

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Aim:The aim of this study was to investigate in vitro the bond strength of composite resins on enamel previously treated with whitening strips. Materials and methods:A total of 48 bovine incisors were allocated to four experimental groups (n = 12 each): G1 (WSC)-treated with 9.5% hydrogen peroxide whitening strips (3D White Whitestrips ® Advanced Vivid/CREST); G2 (WSO)-treated with 10% hydrogen peroxide whitening strips (3D WhiteTM/Oral B); G3 (WG)-treated with 7.5% hydrogen peroxide gel with fluorine, calcium and potassium nitrate (White Class ® /FGM); and G4 (C)-control not subjected to bleaching treatment. The specimens were subjected to bleaching over 2 weeks following the manufacturers' instructions. Following the elaboration of the composite resin test specimens, the samples were stored in artificial saliva and subsequently subjected to the microshear test using the universal testing machine (EMIC ® ). The bond strength values were analyzed by one-way ANOVA and Tukey's statistical test (5%).Results: Significant differences were observed among the investigated groups (p < 0.05). The G3-WG exhibited greater values compared with the control group and the groups treated with strips, G1-WSC and G2-WSO. Analysis of the bond interface revealed that a large fraction of the failures occurred at the enamel-resin interface. Can Whitening Strips interfere with the Bond Strength of Conclusion:The bond strength decreased following 14 days of treatment with bleaching strips, whereas the whitening gel with 7.5% hydrogen peroxide, calcium and fluorine increased the bond strength.

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supporting

confidence: 90%

“…15 Studies that assessed the bond strength using micro-shear and microtensile tests reported that the results from micro-shear test seem to be more adequate when the strength of different adhesive systems is evaluated, 16,17 presenting a greater number of adhesive failures.…”

Section: 12mentioning

confidence: 99%

Can Whitening Strips interfere with the Bond Strength of Composite Resins?

Firoozmand

Reis

Vieira

et al. 2015

The Journal of Contemporary Dental Practice

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“…For enamel, we would have expected an increase in bond strengths compared with the original G- 64 It has been reported that lTBS values tend to be higher because the defect concentration in the small cross-sectional interfacial areas is lower. 65 Although Pashley and Tay 39 reported that the cohesive strength of the adhesive layer might be more relevant than the etching potential of an enamel adhesive for acidic SE adhesives, 10,66 the hydrophobic resin coat application, which increases the cohesive strength of the adhesive layer, was not able to improve the enamel-dentin bonds in our study.…”

Section: Discussionmentioning

confidence: 95%

Immediate Adhesive Properties to Dentin and Enamel of a Universal Adhesive Associated With a Hydrophobic Resin Coat

Perdigão

Muñoz

Sezinando

et al. 2014

Operative Dentistry

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Multi-mode adhesives may be optimized when they are used as self-etch adhesives on dentin with a separate enamel etching step. SUMMARYObjectives: To evaluate the effect of acid etching and application of a hydrophobic resin coat on the enamel/dentin bond strengths and degree of conversion (DC) within the hybrid layer of a universal adhesive system (G-Bond Plus [GB]).Methods: A total of 60 extracted third molars were divided into four groups for bondstrength testing, according to the adhesive strategy: GB applied as a one-step self-etch adhesive (1-stepSE); GB applied as in 1-stepSE followed by one coat of the hydrophobic resin Heliobond (2-stepSE); GB applied as a two-step etch-and-rinse adhesive (2-stepER); GB applied as in 2-stepER followed by one coat of the hydrophobic resin Heliobond (3-stepER). There were 40 teeth used for enamel microshear bond strength (lSBS) and DC; and 20 teeth used for dentin microtensile bond strength (lTBS) and DC. After restorations were constructed, specimens were stored in water (378C/24 h) and then tested at 0.5 mm/min (lTBS) or 1.0 mm/min (lSBS). Enamel-resin

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“…Previous studies have shown that a 60-second chlorhexidine application has an effect on deciduous teeth. 25,26 Because the microtensile bond strength is a reliable in vitro metric to evaluate bond strength 27 and a positive correlation between microtensile and microshear bond strength tests was demonstrated, 28 the methodology utilized in this study was able to detect the differences observed between the tested groups. Furthermore, the common method used to evaluate simulated bond interface aging is to prepare specimens in beam forms with an adhesive 1 mm 2 in area and to soak the bonded specimens at 37 °C.…”

Section: Discussionmentioning

confidence: 97%