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.

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

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.

scholarly journals Effects of Nanohydroxyapatite Incorporation into Glass Ionomer Cement (GIC)

Minerals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 9
Author(s):  
Rishnnia Murugan ◽  
Farinawati Yazid ◽  
Nurrul Shaqinah Nasruddin ◽  
Nur Najmi Mohamad Anuar
Keyword(s):  
Glass Ionomer Cement ◽  
High Stress ◽  
Antibacterial Properties ◽  
Ease Of Use ◽  
Biologically Active ◽  
Fluoride Ion ◽  
Glass Ionomer ◽  
Hydroxyapatite Nanoparticles ◽  
Ion Release ◽  
Ionomer Cement

Glass ionomer cement (GIC) or polyalkenoate cement is a water-based cement that is commonly used in clinical dentistry procedures as a restorative material. It exhibits great properties such as fluoride-ion release, good biocompatibility, ease of use and great osteoconductive properties. However, GIC’s low mechanical properties have become a major drawback, limiting the cement’s usage, especially in high stress-bearing areas. Nanohydroxyapatite, which is a biologically active phosphate ceramic, is added as a specific filler into glass ionomer cement to improve its properties. In this review, it is shown that incorporating hydroxyapatite nanoparticles (nHA) into GIC has been proven to exhibit better physical properties, such as increasing the compressive strength and fracture toughness. It has also been shown that the addition of nanohydroxyapatite into GIC reduces cytotoxicity and microleakage, whilst heightening its fluoride ion release and antibacterial properties. This review aims to provide a brief overview of the recent studies elucidating their recommendations which are linked to the benefits of incorporating hydroxyapatite nanoparticles into glass ionomer cement.

scholarly journals Mechanical and Functional Properties of a Novel Apatite-Ionomer Cement for Prevention and Remineralization of Dental Caries

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3998 ◽  
Author(s):  
Rie Imataki ◽  
Yukari Shinonaga ◽  
Takako Nishimura ◽  
Yoko Abe ◽  
Kenji Arita
Keyword(s):  
Fracture Toughness ◽  
Functional Properties ◽  
Glass Ionomer Cement ◽  
Pediatric Dentistry ◽  
Cement Matrix ◽  
Fluoride Ion ◽  
Ion Release ◽  
Fluoride Ions ◽  
Acid Buffer ◽  
Ionomer Cement

Especially in pediatric dentistry, prevention by the control of initial lesions prior to cavitation is very important, and application of a pit and fissure sealant is essential to achieve this. Numerous reports have suggested that resin-based sealants are inferior to sealants based on glass-ionomer cement (GIC), because of GIC’s many advantages, such as fluoride ion release properties and its good adhesion to tooth structures. However, the use of GIC is impeded due to its low flexural strength and fracture toughness. In this paper, we developed and characterized an apatite-ionomer cement (AIC) that incorporates hydroxyapatite (HAp) into the GIC; this development was aimed at not only reinforcing the flexural and compressive strength but also improving some functional properties for the creation of the material suitable for sealant. We examined the influence of differences in the compounding conditions of GIC powder, liquid, and HAp on flexural and compressive strengths, fracture toughness, fluoride ion release property, shear bond strength to bovine enamel, surface pH of setting cements, and acid buffer capability. These methods were aimed at elucidating the reaction mechanism of porous spherical-shaped HAp (HApS) in AIC. The following observations were deduced. (1) HAp can improve the mechanical strengths of AIC by strengthening the cement matrix. (2) The functional properties of AIC, such as acid buffer capability, improved by increasing the releasing amounts of various ions including fluoride ions. The novel AIC developed in this study is a clinically effective dental material for prevention and remineralization of tooth and initial carious lesion.

scholarly journals Flexural Strength of Glass Carbomer Cement and Conventional Glass Ionomer Cement Stored in Different Storage Media over Time

2018 ◽  
Vol 27 (4) ◽  
pp. 372-377 ◽  
Author(s):  
Muhammad Ali Faridi ◽  
Abdul Khabeer ◽  
Saad Haroon
Keyword(s):  
Flexural Strength ◽  
Artificial Saliva ◽  
Glass Ionomer Cement ◽  
Bending Test ◽  
Glass Ionomer ◽  
Time Intervals ◽  
Storage Media ◽  
Unique Factor ◽  
Post Hoc ◽  
Ionomer Cement

Objectives: Glass ionomer cement (GIC) is routinely placed as a restorative material in dentistry. However, due to its poor physical properties, its use is limited to cases where the level of stress on restoration is minimal. Improved formulations of GIC have been developed to overcome these drawbacks. The purpose of this study was to evaluate flexural strength of a conventional GIC (Fuji IX) against a newly developed glass carbomer cement (GCP). Materials and Methods: For Fuji IX and GCP, a total of 80 blocks were prepared and divided into 16 groups (n = 5). These groups were further categorized according to the storage medium (artificial saliva and Vaseline) and time intervals (24 h and 1, 2, and 4 weeks). A 3-point bending test was carried out, and statistical analysis was done using ANOVA and Tukey post hoc tests. Results: Fuji IX showed a mean flexural strength of 25.14 ± 13.02 versus 24.27 ± 12.57 MPa for GCP. There was no significant statistical difference between both materials when compared under storage media. Both materials showed the highest value for flexural strength at 2 weeks of storage and lowest at 4 weeks. Conclusion: The storage media do not affect the flexural strength of the specimens with reference to time. Time is the unique factor with relative influence on mean resistance to fracture. Further testing is required to evaluate the true potential of the newly developed GCP.

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

scholarly journals Novel Nanotechnology of TiO2Improves Physical-Chemical and Biological Properties of Glass Ionomer Cement

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Daniela Dellosso Cibim ◽  
Miki Taketomi Saito ◽  
Priscila Alves Giovani ◽  
Ana Flávia Sanches Borges ◽  
Vanessa Gallego Arias Pecorari ◽  
...  
Keyword(s):  
Cell Morphology ◽  
Glass Ionomer Cement ◽  
Chemical Properties ◽  
Biological Properties ◽  
Knoop Hardness ◽  
Fluoride Release ◽  
Glass Ionomer ◽  
Physical Chemical ◽  
Powder Component ◽  
Ionomer Cement

The aim of this study was to assess the performance of glass ionomer cement (GIC) added with TiO2nanotubes. TiO2nanotubes [3%, 5%, and 7% (w/w)] were incorporated into GIC’s (Ketac Molar EasyMix™) powder component, whereas unblended powder was used as control. Physical-chemical-biological analysis included energy dispersive spectroscopy (EDS), surface roughness (SR), Knoop hardness (SH), fluoride-releasing analysis, cytotoxicity, cell morphology, and extracellular matrix (ECM) composition. Parametric or nonparametric ANOVA were used for statistical comparisons (α≤0.05). Data analysis revealed that EDS only detected Ti at the 5% and 7% groups and that GIC’s physical-chemical properties were significantly improved by the addition of 5% TiO2as compared to 3% and GIC alone. Furthermore, regardless of TiO2concentration, no significant effect was found on SR, whereas GIC-containing 7% TiO2presented decreased SH values. Fluoride release lasted longer for the 5% and 7% TiO2groups, and cell morphology/spreading and ECM composition were found to be positively affected by TiO2at 5%. In conclusion, in the current study, nanotechnology incorporated in GIC affected ECM composition and was important for the superior microhardness and fluoride release, suggesting its potential for higher stress-bearing site restorations.

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