Effect of nanoparticles on surface characteristics of dental nanocomposite

Salari, Sepehr; Dadkan, Sara; Khakbiz, Mehrdad; Atai, Mohammad

doi:10.1002/mds3.10081

Cited by 6 publications

(3 citation statements)

References 35 publications

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“…The main solicitation compresses the composites that generates an internal response, which implies that the lateral material flow is supported by the polymeric matrix observed by the samples' height reduction and diameter swelling; thus, the filler particles require local repositioning regarding material flow. The sharp edges of the microfiller are tensioned, which leads to local delamination of the larger particles and acts as failure initiators along with increasing solicitations, while the rounded particles such as nanofillers are less affected by the local deformations and are easily displaced along with the flowing polymer matrix [35].…”

Section: Discussionmentioning

confidence: 99%

Properties of Nanohybrid Dental Composites—A Comparative In Vitro Study

Păstrav,

Chisnoiu

et al. 2024

Biomedicines

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(1) Background: the current study investigated three nanohybrid composites: two commercial products ClearfilMajestyTM (CM) and HarmonizeTM (HU), compared with an experimental product PS2. (2) Methods: Two sample types were molded using Teflon dies. The first sample type was represented by standard discs (20 mm diameter and 2 mm thickness) (n = 60, 20/each material), used for surface conditioning investigation, specifically roughness monitoring and color stability analysis using AFM and the CIELab test, respectively. The second sample type was a standard cylindrical specimen (4 mm diameter and 6 mm height) for compression testing (n = 60, 20/each material). After complete polymerization, the samples were ground with sandpaper and further polished. The filler size and distribution in the polymer matrix were investigated with SEM. Data were statistically analyzed using the Anova Test followed by Tukey’s post hoc test on the Origin Lab 2019 software produced by OriginLab Corporation, Northampton, MA, USA. (3) Results: A mono-disperse system was identified in HU samples, while CM and PS2 revealed both nano- and microfiller particles. The samples’ observation after immersion in coffee and tea indicated that a lower roughness combined with optimal filler lamination within the polymer matrix assured the best color preservation. The compression strength was lower for the HU sample, while higher values were obtained for the complex filler systems within CM and PS2. (4) Conclusions: the behavior of the investigated nanohybrid composites strongly depends on the microstructural features.

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Section: Discussionmentioning

confidence: 99%

Properties of Nanohybrid Dental Composites—A Comparative In Vitro Study

Păstrav,

Chisnoiu

et al. 2024

Biomedicines

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“…Some of the main typical energy-absorbing structures are thin-walled structures that have proven fairly effective and been widely studied and employed in vehicles [5][6][7]. To enhance the energy absorption capacity without adding much weight, composite materials have become very effective and popular in many engineering fields [8][9][10][11]. Among composite materials, carbon-reinforced composite tubes are considered as substantially efficient energy-absorbing components that have widely applied in the automotive and aerospace industry.…”

Section: Introductionmentioning

confidence: 99%

A Study of Multi-Objective Crashworthiness Optimization of the Thin-Walled Composite Tube under Axial Load

Seyedi

Khalkhali

2020

Vehicles

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In recent decades, thin-walled composite components have been widely used in the automotive industry due to their high specific energy absorption. A large number of experimental and numerical studies have been conducted to characterize the energy absorption mechanism and failure criteria for different composite tubes. Their results indicate that the energy absorption characteristics depend highly on the failure modes that occur during the impact. And failure mechanism is dependent on fiber material, matrix material, fiber angle, the layout of the fibers, as well as the geometry of structure and load condition. In this paper, first, the finite element (FE) model of the CFRP tube was developed using the Tsai-Wu failure criterion to model the crush characteristics. The FE results were validated using the published experimental. Then, a series of FE simulations were conducted considering different fiber directions and the number of layers to generate enough data for constructing the GMDH-type neural network. The polynomial expression of the three outputs (energy absorption, maximum force, and critical buckling force) was extracted using the GMDH algorithm and was used to perform the Pareto-based multi-objective optimizations. Finally, the failure mechanism of the optimum design point was simulated in LS-DYNA. The main contribution of this study was to successfully model the CFRP tube and damage mechanism using appropriate material constitutive model’s parameters and present the multi-objective method to find the optimum crashworthy design of the CFRP tube.

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“…Their role is to strengthen the polymer or polymer-system properties [5], which lead to aesthetic, optical and mechanical improvements. Also, nanoparticles have proven to enhance the dental material's resistance to wear and improve fatigue [23].…”

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confidence: 99%

Comparison Study on the Influence of Al2O3 Nanoparticle Size and Ternary Hybrid on Several Properties of a PMMA Denture Composite

Earar¹,

Solomon²,

Topor³

et al. 2021

Mater. Plast.

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In esthetic restorative dentistry, resin composites are generally encountered. Because of their excellent biocompatibility, lack of taste, odour, tissue discomfort, and toxicity, insolubility in body fluids, ease of use, good clinical/ aesthetic properties, stable colours, optical characteristics, efficient pigmentation, low cost, and repairability, they are becoming more common. Currently used composite resins have some flaws, particularly inconsistent mechanical properties. For a long time, particles of various sizes have been used as fillers to enhance these properties. In prosthodontics, poly(methyl methacrylate) (PMMA) is commonly used as a dental base material. It does, nevertheless, have several weaknesses, including low strength and weak thermal properties. The effects of different sizes of alumina (Al2O3) particles on the poly(methyl ethacrylate) (PMMA) denture base were determined in this experiment. PMMA powder was blended with Al2O3 added to methyl methacrylate (MMA).For PMMA polymeric materials strengthened with Al2O3 (40 nm, 140 nm and 0.3-0.8 μm) in various concentrations, the mechanical properties were studied.Also, the synergetic influence of the three nanoparticle sizes in the resin matrix was studied.Furthermore, thermogravimetric (TGA) analysis and water absorption and solubility characteristics of the composites prepared were also examined. Among the most significant properties to be obtained for good denture materials is high mechanic properties, water absorption and solubility, since they have different attributes in the aqueous condition of the oral cavity. Results showed clear properties optimization, especially for the size-hybrid alumina composites.

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Effect of nanoparticles on surface characteristics of dental nanocomposite

Cited by 6 publications

References 35 publications

Properties of Nanohybrid Dental Composites—A Comparative In Vitro Study

Properties of Nanohybrid Dental Composites—A Comparative In Vitro Study

A Study of Multi-Objective Crashworthiness Optimization of the Thin-Walled Composite Tube under Axial Load

Comparison Study on the Influence of Al2O3 Nanoparticle Size and Ternary Hybrid on Several Properties of a PMMA Denture Composite

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