Improved mechanical performance of self-adhesive resin cement filled with hybrid nanofibers-embedded with niobium pentoxide

Velo, Marilia Mattar de Amoêdo Campos; Nascimento, Tatiana Rita de Lima; Scotti, Cassiana Koch; Bombonatti, Juliana Fraga Soares; Furuse, Adilson Yoshio; Silva, Vinícius D.; Simões, Thiago A.; Medeiros, Eliton S.; Blaker, Jonny J.; Silikas, Nick; Mondelli, R.

doi:10.1016/j.dental.2019.08.102

Cited by 29 publications

(32 citation statements)

References 61 publications

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“…5 c—GO/MMt); since MMt is an aluminosilicate mineral and because of its hydrophilicity, it has positive effects on adsorption performance 21 . These results also explain the higher flexural strength values demonstrated by G6 compared to G7 ( p < 0.05; Table 2 ) because if nanoparticles were not dispersed adequately, the mechanical properties of the resin with GO/MMt were not increased, as shown by our results, especially flexural strength, which immediately decreased if there was some agglomeration or low distribution of the nanoparticles 24 . In this study, flexural strength was determined as the main indicator of the physical–mechanical properties of RBCs, since it develops tensile, compressive and shear stresses during the test, and testing the material under its most challenging mechanical situation may lead to a reduced chance of accepting a material that fails prematurely due to inadequate strength 44 .…”

Section: Discussionsupporting

confidence: 68%

“…For the flexural strength and modulus of elasticity assessment, bar-shaped samples (8 × 2 × 2 mm 3 ) (n = 6) were prepared by pouring the mixtures described above into stainless steel split-molds, according to ISO 4049 with modification of the sample length to avoid overexposure or uncured regions, considering the diameter of the LED curing device (1,000 mW/cm 2 for 40 s; VALO; Ultradent, Utah, USA) 24 . The tests were conducted using a universal testing machine (Instron 5943, Norwood, MA, USA) equipped with a 500 N load cell using a crosshead speed of 0.5 mm/min.…”

Section: Methodsmentioning

confidence: 99%

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Enhancing the mechanical properties and providing bioactive potential for graphene oxide/montmorillonite hybrid dental resin composites

Velo

Filho

Nascimento

et al. 2022

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This in vitro study synthetized hybrid composite nanoparticles of graphene oxide (GO) and montmorillonite MMt (GO-MMt) by ultrasound treatments. Samples were characterized by X-ray diffraction, FT-Raman, FTIR, TEM and SEM. The effect of their incorporation (0.3% and 0.5%) on the mechanical properties in a resin-based composite (RBC) and their bioactivity potential were evaluated. The specimens were characterized by evaluating their 3-point flexural strength (n = 6), modulus of elasticity (n = 6), degree of conversion (n = 6), microhardness (n = 6), contact angle (n = 3) and SEM analysis (n = 3). In vitro test in SBF were conducted in the RBCs modified by the hybrid. Overall, the synthetized hybrid composite demonstrated that GO was intercalated with MMt, showing a more stable compound. ANOVA and Tukey test showed that RBC + 0.3% GO-MMt demonstrated superior values of flexural strength, followed by RBC + 0.5% GO-MMt (p < 0.05) and both materials showed higher values of microhardness. All groups presented a contact angle below 90°, characterizing hydrophilic materials. RBCs modified by the hybrid showed Ca and P deposition after 14 days in SBF. In conclusion, RBCs composed by the hybrid showed promising results in terms of mechanical properties and bioactive potential, extending the application of GO in dental materials.

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Section: Discussionsupporting

confidence: 68%

Section: Methodsmentioning

confidence: 99%

Enhancing the mechanical properties and providing bioactive potential for graphene oxide/montmorillonite hybrid dental resin composites

Velo

Filho

Nascimento

et al. 2022

Sci Rep

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“…TGA allows, for example, the composition- and conversion-dependent determination of decomposition temperatures, the water and organic as well as inorganic filler content [ 28 , 29 , 30 , 31 ]. Differential scanning calorimetry (DSC) may be utilized to determine the endo-/exothermic heat performance of the materials, and may allow for comparison of the composition, reactivity (conversion), glass transition temperature (TG), phase transformation and influence of storage (e.g., water uptake) on the materials [ 28 , 29 , 30 , 32 , 33 , 34 ]. The areas under the exothermic peak (e.g., crystallization) or endothermic peak (e.g., melting) are proportional to the heat of crystallization or melting.…”

Section: Introductionmentioning

confidence: 99%

Thermoanalytical Investigations on the Influence of Storage Time in Water of Resin-Based CAD/CAM Materials

et al. 2021

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New resin-based composites and resin-infiltrated ceramics are used to fabricate computer-aided design (CAD) and computer-aided manufacturing (CAM)-based restorations, although little information is available on the long-term performance of these materials. The aim of this investigation was to determine the effects of storage time (24 h, 90 days, 180 days) on the thermophysical properties of resin-based CAD/CAM materials. Thermogravimetric Analysis (TGA), differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) were used in the study. TGA provided insight into the composition of the resin-based materials and the influence of internal plasticization and water sorption. Resin-based composites showed different decomposition, heat energy and mechanical behavior, which was influenced by storage time in water. Individual materials such as Grandio bloc showed lower influence of water storage while maintaining good mechanical properties.

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“…Hydroxyapatite nanorods/fibers have been also described as efficient reinforcement materials for composite resins and polymers [ 189 , 190 ], with the advantage of the high remineralization capability. Hydroxyapatite nanorods can present also antimicrobial properties, for example, Chen and coworkers [ 191 ] loaded the nanorods with zinc particles, so the material was able to load Zn 2+ upon use, presenting a high activity inhibiting oral cavity bacteria.…”

Section: Nanorods Nanowires and Nanotubesmentioning

confidence: 99%

Nanomaterials in Dentistry: State of the Art and Future Challenges

2020

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Nanomaterials are commonly considered as those materials in which the shape and molecular composition at a nanometer scale can be controlled. Subsequently, they present extraordinary properties that are being useful for the development of new and improved applications in many fields, including medicine. In dentistry, several research efforts are being conducted, especially during the last decade, for the improvement of the properties of materials used in dentistry. The objective of the present article is to offer the audience a complete and comprehensive review of the main applications that have been developed in dentistry, by the use of these materials, during the last two decades. It was shown how these materials are improving the treatments in mainly all the important areas of dentistry, such as endodontics, periodontics, implants, tissue engineering and restorative dentistry. The scope of the present review is, subsequently, to revise the main applications regarding nano-shaped materials in dentistry, including nanorods, nanofibers, nanotubes, nanospheres/nanoparticles, and zeolites and other orders porous materials. The results of the bibliographic analysis show that the most explored nanomaterials in dentistry are graphene and carbon nanotubes, and their derivatives. A detailed analysis and a comparative study of their applications show that, although they are quite similar, graphene-based materials seem to be more promising for most of the applications of interest in dentistry. The bibliographic study also demonstrated the potential of zeolite-based materials, although the low number of studies on their applications shows that they have not been totally explored, as well as other porous nanomaterials that have found important applications in medicine, such as metal organic frameworks, have not been explored. Subsequently, it is expected that the research effort will concentrate on graphene and zeolite-based materials in the coming years. Thus, the present review paper presents a detailed bibliographic study, with more than 200 references, in order to briefly describe the main achievements that have been described in dentistry using nanomaterials, compare and analyze them in a critical way, with the aim of predicting the future challenges.

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Improved mechanical performance of self-adhesive resin cement filled with hybrid nanofibers-embedded with niobium pentoxide

Cited by 29 publications

References 61 publications

Enhancing the mechanical properties and providing bioactive potential for graphene oxide/montmorillonite hybrid dental resin composites

Enhancing the mechanical properties and providing bioactive potential for graphene oxide/montmorillonite hybrid dental resin composites

Thermoanalytical Investigations on the Influence of Storage Time in Water of Resin-Based CAD/CAM Materials

Nanomaterials in Dentistry: State of the Art and Future Challenges

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