Dual modified nanosilica particles as reinforcing fillers for dental adhesives: Synthesis, characterization, and properties

Mazloom-Jalali, Azin; Taromi, Faramarz Afshar; Atai, Mohammad; Solhi, Laleh

doi:10.1016/j.jmbbm.2020.103904

Cited by 11 publications

(4 citation statements)

References 49 publications

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“…This finding agrees with previous studies that also observed that the addition of a certain amount of filler particles can promote an improvement in these mechanical properties [17][18][19][20][21]. In the studies by Azad et al [20] and Mazloon-Jalali et al [34], the positive effect of the addition of silica nanoparticles on the flexural strength occurred only when up to 0.2% of inorganic content was present, being attributed to the good interfacial adhesion between resin matrix and fillers, which would facilitate the transfer of stresses from the matrix to the fillers, avoiding the propagation of cracks and, consequently, leading to greater mechanical strength. At higher concentrations, these authors believe that an agglomeration of the filler particles occurred, generating fragility points where the cracks would start, thus reducing the mechanical strength.…”

Section: Discussionsupporting

confidence: 92%

Formulation and Characterization of Experimental Adhesive Systems Charged with Different Concentrations of Nanofillers: Physicomechanical Properties and Marginal Gap Formation

Correia,

Poskus,

Guimarães

et al. 2024

Applied Sciences

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This study aimed to formulate and characterize experimental dental adhesives charged with different concentrations of nanofillers. Different concentrations (0, 7.5 wt%, and 15 wt%) of nanosized silica (50 nm) were added to the bond of a two-bottle experimental etch-and-rinse adhesive system (EA0, EA7.5, and EA15). The following physicomechanical properties were evaluated: degree of conversion (DC%), ultimate tensile strength (UTS), flexural strength (FS), static modulus of elasticity (SME), dynamic modulus of elasticity (DME), and glass transition temperature (Tg). Marginal integrity (%MG) was evaluated in standardized class I cavities hybridized with the EAs and restored using two dental composites (CON-conventional and OBF-bulk-fill): EA0CON, EA7.5CON, EA15CON, EA0OBF, EA7.5OBF, and EA15OBF. Gap formation was measured in the occlusal and mesial tooth-restoration interfaces using a 3D laser confocal microscope. Microtensile bond strength (µTBS) was evaluated using dentin-composite beams (1 × 1 mm) obtained from restorations. Data were submitted to ANOVA and Tukey’s test (α = 0.05). For DC% and Tg, EA15 < EA0 = EA7.5 (p < 0.05). For UTS, EA0 < EA7.5 < EA15. For FS, SME, and DME, EA0 < EA7.5 = EA15 (p < 0.05). For the gap formation analysis, there were statistical differences only for the conventional composite (EA0CON > EA7.5CON = EA15CON). The lowest values (p < 0.05) of µTBS were observed for the groups restored with EAs without inorganic content. In conclusion, charging dental adhesives with nanofillers may be a suitable strategy for improving their properties as well as their interaction with dental substrates.

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Section: Discussionsupporting

confidence: 92%

Formulation and Characterization of Experimental Adhesive Systems Charged with Different Concentrations of Nanofillers: Physicomechanical Properties and Marginal Gap Formation

Correia,

Poskus,

Guimarães

et al. 2024

Applied Sciences

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“…4 Researchers have previously incorporated nanofillers in the adhesives and demonstrated that adding these nanoparticles (NPs) could improve their shear and micro-tensile bond strength, fracture toughness, and dentin interaction in-vitro. [5][6][7] Due to their nano size, these NPs entail superior chemical reactivity due to the increased surface area to mass ratio, and this enhanced reactivity perhaps improves their mechanical properties. 8 Although these filler NPs can positively expand various adhesive properties, the search to obtain a material that maximally optimizes its mechanical properties ensues.…”

Section: Introductionmentioning

confidence: 99%

RETRACTED: Influence of carbon and graphene oxide nanoparticle on the adhesive properties of dentin bonding polymer: A SEM, EDX, FTIR study

Alsunbul

AlFawaz

AlHamdan

et al. 2023

Journal of Applied Biomaterials & Functional Materials

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Objective: This study was aimed at including 2.5 wt.% of carbon nanoparticles (CNPs) and graphene oxide NPs (GNPs) in a control adhesive (CA) and then investigate the effect of this inclusion on their mechanical properties and its adhesion to root dentin. Materials and methods: Scanning electron microscopy and energy dispersive X-ray (SEM-EDX) mapping were conducted to investigate the structural features and elemental distribution of CNPs and GNPs, respectively. These NPs were further characterized by Raman spectroscopy. The adhesives were characterized by evaluating their push-out bond strength (PBS), rheological properties, degree of conversion (DC) investigation, and failure type analysis. Results: The SEM micrographs revealed that the CNPs were irregular and hexagonal, whereas the GNPs were flake-shaped. EDX analysis showed that carbon (C), oxygen (O), and zirconia (Zr) were found in the CNPs, while the GNPs were composed of C and O. The Raman spectra for CNPs and GNPs revealed their characteristic bands (CNPs-D band: 1334 cm−1, GNPs-D band: 1341 cm−1, CNPs-G band: 1650 cm−1, and GNPs-G band: 1607 cm−1). The testing verified that the highest bond strength to root dentin were detected for GNP-reinforced adhesive (33.20 ± 3.55 MPa), trailed closely by CNP-reinforced adhesive (30.48 ± 3.10 MPa), while, the CA displayed lowest values (25.11 ± 3.60 MPa). The inter-group comparisons of the NP-reinforced adhesives with the CA revealed statistically significant results ( p < 0.01). Failures of adhesive nature were most common in within the adhesives and root dentin. The rheological assessment results demonstrated a reduced viscosity for all the adhesives observed at advanced angular frequencies. All the adhesives verified suitable dentin interaction shown by hybrid layer and appropriate resin tag development. A reduced DC was perceived for both NP-reinforced adhesives, compared to the CA. Conclusion: The present study’s findings have demonstrated that 2.5% GNP adhesive revealed the highest, suitable root dentin interaction, and acceptable rheological properties. Nevertheless, a reduced DC was observed (matched with the CA). Prospective studies probing the influence of diverse concentrations of filler NPs on the adhesive’s mechanical properties to root dentin are recommended.

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“…This method allows filler show hydrophobicity, which makes them easier to disperse in the resin matrix. 50 – 54 Besides, the grafted polymers can act as a functional transition layer and interact with the organic monomers, thereby enhancing the filler/resin interface bonding. 55 , 56 Various polymers have been grafted onto filler surface, such as PMMA, Bis-GMA, polyacrylic acid, MA-POSS, and oligomers, and the results demonstrated that the grafting polymer layers and their content had significant effects on the mechanical properties, polymerization shrinkage, absorption-solubility properties, degree of conversion, as well as other properties of DRCs.…”

Section: Modification Of Filler/resin Interface Interactionmentioning

confidence: 99%

Micromechanical interlocking structure at the filler/resin interface for dental composites: a review

et al. 2023

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Dental resin composites (DRCs) are popular materials for repairing caries or dental defect, requiring excellent properties to cope with the complex oral environment. Filler/resin interface interaction has a significant impact on the physicochemical/biological properties and service life of DRCs. Various chemical and physical modification methods on filler/resin interface have been introduced and studied, and the physical micromechanical interlocking caused by the modification of fillers morphology and structure is a promising method. This paper firstly introduces the composition and development of DRCs, then reviews the chemical and physical modification methods of the filler/resin interface, mainly discusses the interface micromechanical interlocking structures and their enhancement mechanism for DRCs, finally give a summary on the existing problems and development potential.

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Dual modified nanosilica particles as reinforcing fillers for dental adhesives: Synthesis, characterization, and properties

Cited by 11 publications

References 49 publications

Formulation and Characterization of Experimental Adhesive Systems Charged with Different Concentrations of Nanofillers: Physicomechanical Properties and Marginal Gap Formation

Formulation and Characterization of Experimental Adhesive Systems Charged with Different Concentrations of Nanofillers: Physicomechanical Properties and Marginal Gap Formation

RETRACTED: Influence of carbon and graphene oxide nanoparticle on the adhesive properties of dentin bonding polymer: A SEM, EDX, FTIR study

Micromechanical interlocking structure at the filler/resin interface for dental composites: a review

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