Synthesis of Al2O3-0.5B2O3-SiO2 fillers by sol-gel method for dental resin composites

Aguiar, Aline Evangelista; Silva, Lidiane Gomes da; Barbosa, Henrique Frulani de Paula; Glória, Raphael Felca; Espanhol-Soares, Melina; Gimenes, Rossano

doi:10.1016/j.jnoncrysol.2016.12.007

Cited by 24 publications

(14 citation statements)

References 33 publications

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“…However asignificant broadening and increment of intensity of the bands centered at about 460 and 1100 cm À1 with respect to bulk TEOS can be observed. [27,28] Considering the formation of as ilica xerogel by irradiation of TEOS by an intensef emtosecond laser source,aformation mechanism shouldb ep roposed. Moreover,t he presence of the signal at 955 cm À1 indicates the presence of sylanol (SiÀOH) groups.…”

Section: Resultsmentioning

confidence: 99%

“…However,s ilica xerogels with low surfacea rea can be attractive as protectivecoatings. [27,28] Considering the formation of as ilica xerogel by irradiation of TEOS by an intensef emtosecond laser source,aformation mechanism shouldb ep roposed. In xerogel synthesis by the sol-gelp rocess, the most important step is the formationo f M(OR) nÀ1 (OH) species.…”

Section: Resultsmentioning

confidence: 99%

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Silica Xerogel Obtained by Ultrashort Laser Irradiation of Tetraethyl Orthosilicate

et al. 2017

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The formation of an opaque solid foam was induced by the direct interaction between tetraethyl orthosilicate (TEOS) and an ultrashort femtosecond laser source(Nd:glass, 527 nm, 10 Hz, 250 fs). The product, which resulted to be a silica xerogel, was characterized by different techniques. In particular, information about the morphology was obtained by scanning and transmission electron microscopy (SEM and TEM), while the presence of different functional groups was studied through IR measurements. Since the properties of this kind of material can be improved by functionalizing it with metal nanoparticles, a palladium metal target was ablated in liquid TEOS. TEM images show that palladium was present in the form of nanoparticles and EDX measurements confirm the presence of the metal inside the silica network.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Silica Xerogel Obtained by Ultrashort Laser Irradiation of Tetraethyl Orthosilicate

et al. 2017

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“…Recently, CAMPHORQUINONE (CQ) was widely used as light-sensitive initiator. 8 2-(dimethylamino) ethyl methacrylate (DMAEMA), 9,10 and ethyl 4-(dimethylamino)benzoate (4-EDMAB) as accelerators were commonly employed for the fast polymerization of dental resin composite. 11,12 Coupling agents have major impact on bonding strength between the organic and inorganic materials.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the physical, mechanical and thermal properties of nano and microsized particulate-filled dental composite material

Yadav

Kumar

2020

Journal of Composite Materials

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Objective The purpose of this study was to fabricate bisphenol-a glycidyl methacrylate /tri-ethylene glycol dimethacrylate (TEGDMA)-based nano and micro-sized-filled dental composite and to study the effect of varying silane-treated nano hydroxyapatite on physical, mechanical and thermal properties. Methods The dental resin matrix was fabricated by bisphenol-a glycidyl (53 wt.%), TEGDMA (46 wt.%), camphorquinone (0.3 wt.%) and 2-(dimethylamino) ethyl methacrylate (0.7 wt.%). Silane-treated nano hydroxyapatite (nHA) filler content was varied from 0 to 8 wt.%, while zinc oxide (microsized) remains constant with 20 wt.%. A light curing unit was employed for polymerization of the resinous dental mixture. Results The result revealed that infrared spectra of untreated and treated nHA filler particles were confirmed by Fourier transform infrared spectroscopy. The dental composite filled with 6 wt.% nHA (DHZ6) exhibited maximum compressive strength (249 MPa) and Vickers hardness (49 Hv), while dental composite filled with 8 wt.% nHA (DHZ8) showed minimum depth of cure (5.12 mm), degree of conversion (54%) and polymerization shrinkage (1.12%). Significance Silane treatment of nano hydroxyapatite has a significant role in physical, mechanical, and thermal properties. Bonding strength of coupling agent has been seen between organic and inorganic materials.

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“…Photo‐cured dental resin composites have been widely used for restoring dental defects and caries instead of conventional metallic dental amalgam due to their sufficient strength, superior biocompatibility, and excellent esthetics . Such restorative composites generally consist of a continuous polymeric matrix (most commonly used: bisphenol‐α‐glycidyl methacrylate [Bis‐GMA] and triethylene glycol dimethacrylate [TEGDMA]) reinforced with various inorganic micro/nano fillers such as barium glass, SiO 2 , Al 2 O 3 , and ZrO 2 . With the advancement of nanotechnologies, nanoparticles have been increasingly adopted as the reinforcement in dental composites for better performances and new functionalities.…”

Section: Introductionmentioning

confidence: 99%

Nanoindentation study on mechanical properties and curing depth of dental resin nanocomposites

Zha

et al. 2018

Polymer Composites

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Mechanical properties and curing depth of bisphenol‐α‐glycidyl methacrylate/triethylene glycol dimethacrylate‐based dental composites were systematically investigated by site‐specific nanoindentation tests. Effects of filler (20‐nm silica nanoparticle) content on the nanohardness and elastic modulus of the composites were studied in comparison with micromechanics theoretical models. Results showed that the incorporation of the silica nanoparticles at low contents (up to 5.66 vol%) significantly increases the hardness and elastic modulus of the dental composites by up to 65% and 30%, respectively. It was found that the Counto model gave good predictions for the composite modulus as a function of filler content. For the specific composites studied here, the depth of cure increases approximately linearly with the filler content, which may be ascribed to the stronger reinforcement effect of the silica nanoparticles on the dental composites at a higher particle content. These results combined demonstrate the effectiveness of silica nanoparticles as the reinforcement for dental restorative materials even at small volume fractions. POLYM. COMPOS., 40:1473–1480, 2019. © 2018 Society of Plastics Engineers

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Synthesis of Al2O3-0.5B2O3-SiO2 fillers by sol-gel method for dental resin composites

Cited by 24 publications

References 33 publications

Silica Xerogel Obtained by Ultrashort Laser Irradiation of Tetraethyl Orthosilicate

Silica Xerogel Obtained by Ultrashort Laser Irradiation of Tetraethyl Orthosilicate

Investigation of the physical, mechanical and thermal properties of nano and microsized particulate-filled dental composite material

Nanoindentation study on mechanical properties and curing depth of dental resin nanocomposites

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