scholarly journals Calcium Charge and Release of Conventional Glass-Ionomer Cement Containing Nanoporous Silica

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1295 ◽  
Author(s):  
Koichi Nakamura ◽  
Shigeaki Abe ◽  
Hajime Minamikawa ◽  
Yasutaka Yawaka
Keyword(s):  
Calcium Ion ◽  
Calcium Concentration ◽  
Glass Ionomer Cement ◽  
Nanoporous Silica ◽  
Glass Ionomer ◽  
Release Behavior ◽  
Ion Release ◽  
X Ray ◽  
Release Property ◽  
Ionomer Cement

The aim of this study was to evaluate calcium charge and release of conventional glass-ionomer cement (GIC) containing nanoporous silica (NPS). Experimental specimens were divided into two groups: the control (GIC containing no NPS) and GIC-NPS (GIC containing 10 wt % NPS). The specimens were immersed in calcium chloride solutions of 5 wt % calcium concentration for 24 h at 37 °C, whereupon the calcium ion release of the specimens was measured. The calcium ion release behavior of GIC-NPS after immersion in the calcium solution was significantly greater than that of the control. Scanning electron microscopy and electron-dispersive X-ray spectroscopy results indicated that calcium penetrated inside the GIC-NPS specimen, while the calcium was primarily localized on the surface of the control specimen. It was demonstrated that NPS markedly improved the calcium charge and release property of GIC.

Controlled Ion Release Property of Glass Ionomer Cement Containing Nanoporous Silica Particles

2016 ◽  
Vol 720 ◽  
pp. 17-20
Author(s):  
Ko Nakanishi ◽  
Yosuke Bando ◽  
Tomohiko Katsurayama ◽  
Shino Morimoto ◽  
Shigeaki Abe ◽  
...  
Keyword(s):  
Glass Ionomer Cement ◽  
Silica Particles ◽  
Nanoporous Silica ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Release Behavior ◽  
Ion Release ◽  
Dye Release ◽  
Release Property ◽  
Ionomer Cement

Controlled ion release property of nanoporous silica particles (NPS) were investigated using cationic fluorescent dye, rhodamine B. The dye was charged into a glass ionomer cements (GIC) pellet containing the particles and then the pellet were immersed into distilled water. The dye-release behavior was observed using a UV-vis. spectrophotometer. GIC containing NPS can release the dye for a couple of weeks, where as other samples released it only a few days. This result suggests that NPS has excellent sustained dye-release property.

scholarly journals Effects of Powdery Cellulose Nanofiber Addition on the Properties of Glass Ionomer Cement

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3077 ◽  
Author(s):  
Takako Nishimura ◽  
Yukari Shinonaga ◽  
Chikoto Nagaishi ◽  
Rie Imataki ◽  
Michiko Takemura ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Cellulose Nanofibers ◽  
Glass Ionomer Cement ◽  
Chemical Properties ◽  
Fluoride Ion ◽  
Strength Testing ◽  
Glass Ionomer ◽  
Ion Release ◽  
Diametral Tensile Strength ◽  
Ionomer Cement

In this study, we aimed to evaluate the effect of the addition of powdery cellulose nanofibers (CNFs) on the mechanical properties of glass ionomer cement (GIC) without negatively affecting its chemical properties. Commercial GIC was reinforced with powdery CNFs (2–8 wt.%) and characterized in terms of flexural strength, compressive strength, diametral tensile strength, and fluoride-ion release properties. Powdery CNFs and samples subjected to flexural strength testing were observed via scanning electron microscopy. CNF incorporation was found to significantly improve the flexural, compressive, and diametral tensile strengths of GIC, and the corresponding composite was shown to contain fibrillar aggregates of nanofibers interspersed in the GIC matrix. No significant differences in fluoride-ion release properties were observed between the control GIC and the CNF-GIC composite. Thus, powdery CNFs were concluded to be a promising GIC reinforcement agent.

Potassium ion release from a glass ionomer cement matrix

Biomaterials ◽  
2001 ◽  
Vol 22 (6) ◽  
pp. 547-554 ◽  
Author(s):  
J.A. Williams ◽  
R.W. Billington ◽  
G.J. Pearson
Keyword(s):  
Glass Ionomer Cement ◽  
Potassium Ion ◽  
Cement Matrix ◽  
Glass Ionomer ◽  
Ion Release ◽  
Ionomer Cement

Glass Ionomer Cement – Development and Characterization Microstructural

2014 ◽  
Vol 805 ◽  
pp. 12-18
Author(s):  
Waldênia P. Freire ◽  
Marcus Vinícius Lia Fook ◽  
Emilly F. Barbosa ◽  
Camila S. Araújo ◽  
Rossemberg C. Barbosa ◽  
...  
Keyword(s):  
Glass Ionomer Cement ◽  
Homogeneous Distribution ◽  
Control Group ◽  
Bone Cements ◽  
Glass Ionomer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Luting Agent ◽  
Diffraction Patterns ◽  
Ionomer Cement

The Glass Ionomers Cements (GICs) are materials widely used in dentistry, have advantages such as fluoride release and chemical adhesion to the dental substrate. They are recommended as a restorative material, luting agent in prosthetic dentistry and also in medicine. However, there is need for developing new bone cements as an alternative or replacement to the current polymethylmethacrylate cements, therefore, the objective of this research was to develop an experimental GIC and characterization regarding morphology, chemical composition and crystallinity. This composite was characterized by X-ray diffraction (XRD), Infrared Spectroscopy Fourier Transform (FTIR) and optical microscopy (OM). For comparative study, was used the GIC Vidrion R (SS White) in the control group. These cements are presented in semi-crystalline diffraction patterns, the FTIR spectra observed characteristic bands of these materials and microstructural study of the cements showed homogeneous distribution of filler in the polymer matrix, corroborating with the literature.

Electric Charge Dependence of Controlled Dye-Release Behavior in Glass Ionomer Cement Containing Nano-Porous Silica Particles

2018 ◽  
Vol 18 (1) ◽  
pp. 75-79 ◽  
Author(s):  
Yosuke Bando ◽  
Ko Nakanishi ◽  
Shigeaki Abe ◽  
Shuichi Yamagata ◽  
Yasuhiro Yoshida ◽  
...  
Keyword(s):  
Electric Charge ◽  
Glass Ionomer Cement ◽  
Porous Silica ◽  
Silica Particles ◽  
Glass Ionomer ◽  
Release Behavior ◽  
Dye Release ◽  
Charge Dependence ◽  
Ionomer Cement

Buffering and ion-release by a glass-ionomer cement under near-neutral and acidic conditions

Biomaterials ◽  
2002 ◽  
Vol 23 (13) ◽  
pp. 2783-2788 ◽  
Author(s):  
Beata Czarnecka ◽  
Honorata Limanowska-Shaw ◽  
John W. Nicholson
Keyword(s):  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Ion Release ◽  
Acidic Conditions ◽  
Ionomer Cement

Factors relating to the rate of fluoride-ion release from glass-ionomer cement

1982 ◽  
Vol 10 (4) ◽  
pp. 333-341 ◽  
Author(s):  
M. Cranfield ◽  
A.T. Kuhn ◽  
G.B. Winter
Keyword(s):  
Glass Ionomer Cement ◽  
Fluoride Ion ◽  
Glass Ionomer ◽  
Ion Release ◽  
Ionomer Cement

Ion release by endodontic grade glass-ionomer cement

2007 ◽  
Vol 18 (4) ◽  
pp. 649-652 ◽  
Author(s):  
Beata Czarnecka ◽  
Honorata Limanowska-Shaw ◽  
Richard Hatton ◽  
John W. Nicholson
Keyword(s):  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Ion Release ◽  
Ionomer Cement

scholarly journals Biophysical and Fluoride Release Properties of a Resin Modified Glass Ionomer Cement Enriched with Bioactive Glasses

Symmetry ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 494
Author(s):  
Ascensión Vicente ◽  
Francisco Javier Rodríguez-Lozano ◽  
Yolanda Martínez-Beneyto ◽  
María Jaimez ◽  
Julia Guerrero-Gironés ◽  
...  
Keyword(s):  
Cell Migration ◽  
Bond Strength ◽  
Glass Ionomer Cement ◽  
Fluoride Ion ◽  
Fluoride Release ◽  
Glass Ionomer ◽  
Ion Release ◽  
Bioactive Glasses ◽  
Resin Modified Glass Ionomer ◽  
Ionomer Cement

The aim of this study was to evaluate the bond strength, microleakage, cytotoxicity, cell migration and fluoride ion release over time from a resin-modified glass-ionomer cement (RMGIC) enriched with bioactive glasses (BAGs) and a nanohybrid restorative polymer resin agent used as adhesion material in the cemented brackets. One hundred and twenty bovine lower incisors were divided into three groups: (Transbond Plus Self Etching Primer (TSEP)/Transbond XT (TXT), TSEP/ACTIVA, orthophosphoric acid gel/ACTIVA) and brackets were bonded. A bond strength test and microleakage test were applied. A fluoride release test was applied after 60 days for the TXT and ACTIVA group. To evaluate cytotoxicity and cell migration, a cell viability and scratch migration assay were done for each group. p values < 0.05 were considered significant. Regarding bond strength and microleakage test, no significant differences were found between TSEP/TXT and TSEP/ACTIVA. At 6.4 pH, ACTIVA showed a higher degree of fluoride ion release, which increased with acid pH (3.5), with a maximum fluoride secretion at 30 days. MTT assay revealed that TXT reduces the viability of gingival cells with significant differences (p < 0.001) compared to the untreated cells (control group). ACTIVA provides optimal adhesive and microfiltration properties, releases substantial amounts of fluoride ions in both acid and neutral media, and its biocompatibility is greater than that of traditional composite resin adhesive systems.

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