Shear bond strength to dentine of dental adhesives containing hydroxyapatite nano-fillers

Lezaja, Maja; Jokić, Bojan; Veljović, Djordje; Miletić, Vesna

doi:10.1080/01694243.2016.1197086

Cited by 14 publications

(15 citation statements)

References 34 publications

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“…10-MDP monomer from SBU was previously shown to interact chemically with partially demineralized HA in dentin and reported to strengthen the mechanism of bonding. 16 It has not been investigated if 10-MDP monomer would potentially interact with HAp fillers in the adhesive and if this interaction would disperse the adhesive on dentin or buffer the acidity of the adhesive. 25 All these postulations may contribute to the inferior SBS of the experimental adhesive.…”

Section: Discussionmentioning

confidence: 99%

“…15 Lezaja et al suggested that HAP nano-fillers may improve bond strength of total-etch adhesives without an adverse effect on adhesive dispersion on dentin and its ability to infiltrate dentinal tubules. 16 Until current date, there are limited reports available on the interaction of HA nanoparticles in universal adhesives. Moreover, no golden protocol for achieving stable and optimal adhesion of universal adhesive systems to dentin.…”

Section: Introductionmentioning

confidence: 99%

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Shear Bond Strength of a Multi-Mode Universal Adhesive Containing Hydroxy-Apatite Nanoparticles to Dentin (In vitro study)

Ghyadh

Ragab

Osman

2021

Egyptian Dental Journal

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Aim: To evaluate the effect of addition of Hydroxyl-Apatite nanoparticles to a commercial universal adhesive on sheer-bond-strength to dentin using two application modes, immediately and after thermocycling. Methods: A-commercial UA was used for bonding composite-resin to dentin and considered as control. 10% of HAp were prepared and added to the commercial UA and considered as experimental. 88-freshly extracted sound human premolar teeth were sectioned to expose midcoronal-dentin. Samples were y divided into: control and experimental group. Each group was further divided based on the application protocol. Half of the samples were stored in distilled water for 24h at 37°C for immediate SBS testing whereas the other half was subjected to thermocycling for 20,000 cycles. SBS was measured one-day post polymerization and after thermocycling using universal testing machine. SBS values and failure modes were recorded and statistically analyzed.Results: the experimental group presented significantly lower resin-dentin SBS than the control group. Thermocycling significantly lowered SBS values for both groups. When using SE mode, the experimental group reported lower resin-dentin SBS than the control group before and after thermocyclying. When using ER mode before thermocycling, no significant difference was found between the two groups, while after thermocycling, the experimental group reported significantly higher resin-dentin SBS than the control group. For both adhesive groups, mixed failure dominated with ER mode while adhesive failure dominated with SE mode.Conclusions: Addition of HA may provide resistance to degradation and offer a potential to improve resin-dentin bond stability against thermal changes when ER protocol is applied.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Shear Bond Strength of a Multi-Mode Universal Adhesive Containing Hydroxy-Apatite Nanoparticles to Dentin (In vitro study)

Ghyadh

Ragab

Osman

2021

Egyptian Dental Journal

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“…However, incorporation of HAp nanorods into Tetric-N Bond caused neutralization of 10MDP diminishing its micromechanical and bonding efficacy to dentin. 22,23 However, at 10wt % HAp nanorods, AdheSE Bond showed lower mean value of µSBS than that of Tetric-N Bond. This could be explained that at this concentration, amount of filler increased markedly in AdheSE Bond (5%silica+10wt.%HApnanorods) which caused further agglomeration rather than that of Tetric-N Bond (1wt.%silica+10wt.% HAp nanorods), so there was no further enhancement at these concentrations.…”

Section: Microshear Bond Strength Test (µSbs)mentioning

confidence: 95%

“…This was in agreement with a study showed that the addition of HAp nanorods to Universal adhesive with etch and rinse strategy did not affect its bond strength. 22…”

Section: Microshear Bond Strength Test (µSbs)mentioning

confidence: 99%

Effect of Incorporation of Hydroxyapatite Nanorods on the Rheological Properties, Micro-shear Bond Strength and Degree of Conversion of Two Dental Adhesives

Mohammed¹,

Motawea

Eltayeb³

2017

ADJ-for Girls

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Purpose: The purpose of this study was to evaluate the effect of incorporation of different concentrations of hydroxyapatite nanorods into two adhesives of two commercial adhesive systems in order to evaluate the effect on rheological properties, microshear bond strength and degree of conversion. Materials and Methods: One hundred twenty specimens were used in the present study. The specimens were divided into two main groups (n=60) according to the type of commercial adhesive used AdheSE Bond (I) and Tetric-N Bond Universal (II). Then each group was subdivided into 4 subgroups (n=15) according to the concentration of incorporated HAp nanorods 0(control), 0.2, 2, 10wt%HAp nanorods (A, B, C and D, respectively). Each subgroup was further divided into 3 divisions according to the type of test performed (n=5). For rheological properties measurements, a rheometer was used to measure the viscosity and the viscoelastic behavior of the adhesives. For microshear bond strength testing (µSBS), the specimens were tested by using a universal testing machine. The type of failure was determined by using scanning electron microscope. The degree of conversion was measured using Fourier Transform Infrared (FTIR) spectroscopy. The data were analyzed using one-way analysis of variance (ANOVA) and Tukey's post hoc significance difference tests. Differences were considered significant at p≤0.05. Two ways analysis of variance ANOVA test was used to study the statistical significance of the interaction between variables (material and HAp nanorods concentrations). Results: The viscosity of experimental adhesives increased gradually with increasing the concentrations of HAp nanorods. In µSBS test, the AdheSE containing 0.2 and 2wt.% HAp nanorods produced significantly the highest values. Regarding degree of conversion (DC), Tetric-N Bond containing 10wt.% HAp nanorods produced significantly the highest value of DC. Conclusion: Incorporation of HAp nanorods with low concentration (0.2wt %) in AdheSE Bond had a positive impact on the bond strength. However, HAp nanorods as fillers were not suitable to be incorporated in Tetric-N Bond.

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“…The results indicate a predominance of cohesive fractures for the control cement (CPZn), whereas for complete cement (HCP) the occurrence of mixed fractures was greater, being surpassed only by the cement without zinc oxide-magnesium (HC). These results would be related to the porous structure of this cement, which causes a higher incidence of propagation of mixed fractures along with the sample and higher variations in the results 41 . All test values presented the statistical significance of results (p ≤0.05).…”

Section: Shear Strengthmentioning

confidence: 98%

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2020

IJPSR

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Shear bond strength to dentine of dental adhesives containing hydroxyapatite nano-fillers

Cited by 14 publications

References 34 publications

Shear Bond Strength of a Multi-Mode Universal Adhesive Containing Hydroxy-Apatite Nanoparticles to Dentin (In vitro study)

Shear Bond Strength of a Multi-Mode Universal Adhesive Containing Hydroxy-Apatite Nanoparticles to Dentin (In vitro study)

Effect of Incorporation of Hydroxyapatite Nanorods on the Rheological Properties, Micro-shear Bond Strength and Degree of Conversion of Two Dental Adhesives

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