scholarly journals Evaluation of Fracture Toughness, Color Stability, and Sorption Solubility of a Fabricated Novel Glass Ionomer Nano Zirconia-Silica-Hydroxyapatite Hybrid Composite Material

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Sami D. Aldhuwayhi ◽  
Arbaz Sajjad ◽  
Wan Zaripah W. Bakar ◽  
Dasmawati Mohamad ◽  
Thirumulu P. Kannan ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Color Change ◽  
Sol Gel ◽  
Glass Ionomer Cement ◽  
Color Stability ◽  
Glass Ionomer ◽  
X Ray Diffraction ◽  
One Pot ◽  
Gel Technique ◽  
Luting Material

The aim of this study was to investigate the effects of adding a nano zirconia-silica-hydroxyapatite (nanoZrO2-SiO2-HA) composite synthesized using a one-pot sol-gel technique to a conventional glass ionomer cement (GIC), which was then characterized using X-ray diffraction (XRD). Following the characterization studies, further investigations were carried out after the addition of nanoZrO2-SiO2-HA to cGIC (GIC nanoZrO2-SiO2-HA) at various percentages (~5% to 9%) to compare their fracture toughness, color stability, and sorption- solubility in relation to cGIC (Fuji IX). The XRD diffractogram indicated the presence of peaks for ZrO2, SiO2, and HA. The fracture toughness of GIC 5%nanoZrO2-SiO2-HA was statistically higher than that of other percentages of GIC nanoZrO2-SiO2-HA and cGIC. The highest values recorded were fracture toughness ( 1.35 ± 0.15   MPa . m 1 / 2 ), leading to an increase of ∼57%, as compared to cGIC. Overall, the color change ( Δ E ) values for GIC 5% nano Zr-Si-HA group were lower than those of cGIC over a one-month period and were between slight and perceptible. In addition, GIC 5%nanoZrO2-SiO2-HA recorded lower sorption values ( 23.64 ± 2.3   μ gm m − 3 ) as compared to cGIC ( 36.28 ± 2.6   μ gm m − 3 ) and higher solubility ( 66.46 ± 2.4   μ gm m − 3 ) as compared to cGIC ( 56.76 ± 1.6   μ gm m − 3 ). The addition of nanoZrO2-SiO2-HA to cGIC significantly enhanced its physicomechanical properties. Based on the results of our study, GIC nanoZrO2-SiO2-HA has the potential to be suggested as a restorative dental material with diverse applications ranging from cavity restoration, core build-up, and as a luting material.

Novel nano-hydroxyapatite-silica–added glass ionomer cement for dental application: Evaluation of surface roughness and sol-sorption

2019 ◽  
Vol 28 (5) ◽  
pp. 299-308
Author(s):  
Imran Alam Moheet ◽  
Norhayati Luddin ◽  
Ismail Ab Rahman ◽  
Sam’an Malik Masudi ◽  
Thirumulu Ponnuraj Kannan ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Electron Microscope ◽  
Sol Gel ◽  
Sorption Property ◽  
Glass Ionomer Cement ◽  
Weight Ratio ◽  
Lower Surface ◽  
Glass Ionomer ◽  
One Pot ◽  
Ionomer Cement

The aim of this study was to synthesize and characterize nano-hydroxyapatite-silica (nano-HA-Si) particle, followed by the evaluation of surface roughness and sol-sorption property of conventional glass ionomer cement (cGIC) with the addition of nano-HA-Si. Nano-HA-Si was synthesized by one-pot sol–gel technique. It was then characterized using Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscope, and transmission electron microscope. Experimental nano-HA-Si–added GIC (nano-HA-Si-GIC) was prepared by adding 10% by weight ratio of nano-HA-Si to cGIC powder. The surface roughness of the samples was analyzed using tactile profilometer. Mass stabilization techniques were used to assess sol-sorption. The 10% nano-HA-Si-GIC samples were successfully fabricated. Nano-HA-Si-GIC reported lower surface roughness (0.13 ± 0.01 μm) as compared to cGIC (0.16 ± 0.03 μm). Nano-HA-Si-GIC reported an increase in sol-sorption when compared to cGIC. Incorporation of nano-HA-Si into the formulation of cGIC enhances their physical properties and with slight increase in sol-sorption property. Nano-HA-Si-GIC has the ability to enhance the characteristics of glass ionomer dental restorative materials. Hence, it can be suggested as a potential future restorative material in dentistry.

Color Stability of Glass Ionomer Cement (GIC) Modified with Silica from Beach Sand after Immersion in Arabica Gayo Coffee

2020 ◽  
Vol 48 ◽  
pp. 99-104
Author(s):  
Liana Rahmayani ◽  
Iin Sundari ◽  
Diana Setya Ningsih ◽  
Pocut Aya Sofya ◽  
Rabithah Nasution
Keyword(s):  
Mechanical Properties ◽  
Color Change ◽  
Glass Ionomer Cement ◽  
Color Stability ◽  
Beach Sand ◽  
Glass Ionomer ◽  
Intrinsic Factors ◽  
Average Value ◽  
Color Changes ◽  
Ionomer Cement

The discoloration is a condition that can affect the color stability of a material. The discoloration of glass ionomer cement (GIC) can occur due to extrinsic and intrinsic factors. GIC has poor mechanical properties, which are brittle, which shows high microporosity in GIC. Microporosity of GIC can affect the ability of materials in maintaining color stability. Therefore, it is necessary to add material alternatives to improve the mechanical properties in order to maintain color stability in GIC, such as silica. This study aims to determine the color change in GIC which is added with 5% silica after immersion in gayo arabica packaging coffee. Cylindrical specimens with a diameter of 5 mm and 2 mm thick. Specimens amounted to 16 pieces consisting of two treatment groups, the first group using conventional GIC and the second group using GIC with the addition of silica. Both groups were immersed in arabica gayo coffee for 4 days. Color changes were observed with a stereomicroscope and then the value of CIELab was used using Adobe Photoshop, which measured its average color change parameter (ΔE). The average value of discoloration of conventional GIC ΔE = 5.77 and GIC with the silica addition ΔE = 7.94. The results of the unpaired t-test show a value (p> 0.05) which means that there is a significant color change. It can be concluded that the two groups had discoloration after immersion in Arabica gayo coffee, and the color change value in conventional GIC with the addition of silica was higher than conventional GIC.

scholarly journals Color Stability of Glass Ionomer Cement after Reinforced with Two Different Nanoparticles

2020 ◽  
Vol 2020 ◽  
pp. 1-5
Author(s):  
Sharat Chandra Pani ◽  
Moath Tofik Aljammaz ◽  
Abdullah Mohammed Alrugi ◽  
Abdulaziz Mohammed Aljumaah ◽  
Yazeed Minahi Alkahtani ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Silver Nanoparticles ◽  
Carbon Nanotube ◽  
Silver Nanoparticle ◽  
Color Change ◽  
Glass Ionomer Cement ◽  
Color Stability ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Ionomer Cement

Aim. This study aimed to compare the staining characteristics of a commercially available restorative glass ionomer cement to a formulation reinforced by the addition of carbon nanotubes and another formulation reinforced by the addition of silver nanoparticles to the powder of the same cement. Methodology. Twenty samples each of a control glass ionomer cement (PULPDENT® Glass Fill®, Pulpdent Corp. Watertown, MA, USA), control cement reinforced with 0.0006 gm (0.03% by weight) of carbon nanotubes (Sigma Aldrich, St Louis MO, USA), and control cement reinforced with 0.2 gm (10% by weight) of silver nanoparticles (Nanocyl™, Nanocyl SA, Sambreville, Belgium) were immersed in a staining solution. Color evaluations were carried out after 1 h, 24 h, and 1 week. Color change values were calculated. Results. The results indicated that carbon nanotube reinforced specimens exhibited less color stability when compared to controlled glass ionomer cement specimens; however, both samples had significantly greater color stability than silver nanoparticle reinforced glass ionomer samples. Conclusion. It can be concluded within the limitations of this study that carbon nanotube reinforced glass ionomer cements have better color stability than silver nanoparticle reinforced glass ionomer cements.

Preparation and Characterization of Zn-Containing Hydroxyapatite/TiO2 Composite Coatings on Ti Alloys

2011 ◽  
Vol 685 ◽  
pp. 367-370 ◽  
Author(s):  
Min Qi ◽  
Da Yi Yang ◽  
Jing Ying Zhang ◽  
Hong Jun Ai
Keyword(s):  
Adhesion Strength ◽  
Composite Coatings ◽  
Energy Dispersive Spectrometer ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Zn Content ◽  
Micro Arc Oxidation ◽  
Gel Technique ◽  
Bacteria Resistance

In order to improve the osteoblast growth and bacteria resistance, Zn-containing hydroxyapatite (Zn-HA) and titanium oxide (TiO2) composite coatings were prepared to improve binding between coating and Ti substrate. TiO2 film was prepared on the surface of Ti by micro-arc oxidation (MAO) and Zn-HA coating was deposited on TiO2 using sol–gel technique. Phase structure, composition and microstructure of the surface coatings were analyzed by X-ray diffraction (XRD) and Energy Dispersive Spectrometer (EDS), respectively. The adhesion strength between the coatings with different Zn content was measured by tensile testing. The results showed that there was no significant influence of Zn content on adhesion strength between coating and Ti substrate.

Characterization of SrBi2Nb2O9 Thin Films Prepared by Sol Gel Technique

1996 ◽  
Vol 459 ◽  
Author(s):  
E. Ching-Prado ◽  
W. Pérez ◽  
A. Reynés-Figueroa ◽  
R. S. Katiyar ◽  
D. Ravichandran ◽  
...  
Keyword(s):  
Thin Films ◽  
Raman Band ◽  
Sol Gel ◽  
Orthorhombic Symmetry ◽  
X Ray Diffraction ◽  
Ft Ir ◽  
Gel Technique ◽  
High Degree ◽  
First Time

ABSTRACTThin films of SrBi2Nb2O9 (SBN) with thicknesses of 0.1, 0.2, and 0.4 μ were grown by Sol-gel technique on silicon, and annealed at 650°C. The SBN films were investigated by Raman scatering for the first time. Raman spectra in some of the samples present bands around 60, 167, 196, 222, 302, 451, 560, 771, 837, and 863 cm−1, which correspond to the SBN formation. The study indicates that the films are inhomogeneous, and only in samples with thicknesses 0.4 μ the SBN material was found in some places. The prominent Raman band around 870 cm−1, which is the A1g mode of the orthorhombic symmetry, is assigned to the symmetric stretching of the NbO6 octahedrals. The frequency of this band is found to shift in different places in the same sample, as well as from sample to sample. The frequency shifts and the width of the Raman bands are discussed in term of ions in non-equilibrium positions. FT-IR spectra reveal a sharp peak at 1260 cm−1, and two broad bands around 995 and 772 cm−1. The bandwidths of the latter two bands are believed to be associated with the presence of a high degree of defects in the films. The experimental results of the SBN films are compared with those obtained in SBT (T=Ta) films. X-ray diffraction and SEM techniques are also used for the structural characterization.

scholarly journals Calcination Effect on Structural Trasformation of Barium Titanite Ferroelectric Ceramic by Sol-Gel Method

2019 ◽  
Vol 9 (1) ◽  
pp. 5893-5896
Keyword(s):  
Glacial Acetic Acid ◽  
Sol Gel ◽  
Ferroelectric Ceramic ◽  
Tetrabutyl Titanate ◽  
Chemical Modifier ◽  
Barium Acetate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Gel Technique ◽  
Scanning Electron

High purity barium titanate BaTiO3 was successfully synthesized by using the sol-gel technique. Barium acetate Ba(CH3COO)2 and tetrabutyl titanate, Ti(C4H9O)4 was dissolved moderately in the solvent of glacial acetic acid and ethanol was added as the chemical modifier. The synthesized BaTiO3 nanoparticle was calcined at the temperature range of 700 ºC to 1100 ºC. The powders were further characterized by X-ray diffraction and scanning electron microscopy (SEM). Fined BaTiO3 powders result indicates the phase of tetragonal structures and high crystallites of BaTiO3. It was observed that the crystallinity and particle size of BaTiO3 is greatly influenced by the calcination temperature.

scholarly journals Molecular-field Molecular-field Study on Sn Substituted Yttrium Iron Garnet

2018 ◽  
Vol 34 (1) ◽  
Author(s):  
Nguyen Duong
Keyword(s):  
Sol Gel ◽  
Site Occupancy ◽  
Molecular Field ◽  
X Ray Diffraction ◽  
Scanning Microscope ◽  
Valence States ◽  
Two Samples ◽  
Gel Technique ◽  
Electron Scanning Microscope ◽  
Iron Garnet

Samples with the compositions Y2.9Ca0.1Fe4.9Sn0.1O12 and Y3Fe4.9Sn0.1O12 were prepared by using a sol-gel technique. The influence of the substituted non-magnetic cations with different valences in the structural and magnetic properties was studied. X-ray diffraction and field-emission electron scanning microscope techniques were used to study the crystal structure and morphology. Magnetization curves in fields up to 10 kOe and in temperature range from 80 K to 570 K were measured by means of a vibrating sample magnetometer. Saturation magnetization as a function of temperature of the two samples was analyzed based on the molecular-field theory from that models for site occupancy and valence states of cations in the crystal structures were derived.

Photocatalytic Activity of Bismuth Ferrite Nanoparticles Synthesized via Sol-Gel Route

2019 ◽  
Vol 233 (5) ◽  
pp. 595-607 ◽  
Author(s):  
Mohsin Siddique ◽  
Noor Muhammad Khan ◽  
Muhammad Saeed
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Irradiation Time ◽  
Bismuth Ferrite ◽  
Sol Gel ◽  
Reaction System ◽  
Light Conditions ◽  
X Ray Diffraction ◽  
Light Region ◽  
Gel Technique

Abstract Nanosized, magnetically separable bismuth ferrite (BFO) nanoparticles, pertaining a crystallite size in the range of 14–15 nm were prepared via facile sol-gel technique. The product was characterized by scanning electron microscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy. The product was explored for the photocatalytic mineralization of rhodamine B (RB) dye in aqueous medium. The effect of different investigational parameters such as amount of photocatalyst, initial dye concentration and irradiation time on the photocatalytic degradation of RB was studied. The results reveal that the catalyst shows good degrading ability under normal pH and visible light conditions. BFO nanoparticles demonstrated a strong absorption ability in the visible-light region, which lead to efficient photocatalytic degradation of RB dye The reaction system was heterogeneous in nature in which the catalyst can be separated by a normal magnet.

Structural evaluation of ZnO substitution for CaO in glass ionomer cement synthesized by sol-gel method and their properties

2022 ◽  
Author(s):  
Oranich Thongsri ◽  
Sawitri Srisuwan ◽  
Paritat Thaitalay ◽  
Rawee Dangwiriyakul ◽  
Prasert Aengchuan ◽  
...  
Keyword(s):  
Sol Gel ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Gel Method ◽  
Sol Gel Method ◽  
Structural Evaluation ◽  
Ionomer Cement

scholarly journals Synthesis Photocatalytic and Antibacterial Activities of Nickle Doped Tio2 Nanoparticles

2018 ◽  
Vol 34 (6) ◽  
pp. 3140-3144
Author(s):  
Ritu Vershney ◽  
Komal Chelaramani ◽  
Arpan Bhardwaj ◽  
Nayma Siddiqui ◽  
Suresh Kumar Verma
Keyword(s):  
Photocatalytic Degradation ◽  
Tio2 Nanoparticles ◽  
Sol Gel ◽  
Antibacterial Activities ◽  
X Ray Diffraction ◽  
Zone Of Inhibition ◽  
Time Duration ◽  
X Ray ◽  
Gel Technique ◽  
Doped Titania

The synthesis of Ni doped titania (TiO2) nanoparticles were achieved via simple novel sol gel technique, in which Titanium-n-butoxide and NiCl2 were taken as precursors. Effect of different wt% of dopant in TiO2 was studied on photocatalytic degradation of Aniline blue and Toluidine Blue. The study suggested the increased photocatalytic degradation with increased time duration. The synthesized samples were analyzed by surface electron microscopy (SEM) and X-ray diffraction studies. The antibacterial activity was investigated against Gram-positive Staphylococcus aureus bacteriae. Studies revealed that on increasing the dopant concentration, the diameter of zone of inhibition also increased upto 1.5 wt%.

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