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.

scholarly journals Effects of a glass-ionomer cement on the remineralization of occlusal caries: an in situ study

2006 ◽  
Vol 20 (2) ◽  
pp. 91-96 ◽  
Author(s):  
Mônica Tostes Amaral ◽  
Antônio Carlos Guedes-Pinto ◽  
Orlando Chevitarese
Keyword(s):  
Glass Ionomer Cement ◽  
Knoop Hardness ◽  
Glass Ionomer ◽  
In Situ Study ◽  
Group I ◽  
Oral Environment ◽  
Group Ii ◽  
Pits And Fissures ◽  
Ionomer Cement

This work evaluated the remineralization of demineralized enamel of pits and fissures of human third molars sealed with a glass ionomer cement (Fuji IX, GC Corporation - Japan) or with a Bis-GMA sealant (Delton - Dentsply). Ten volunteers participated in this in situ study that consisted of two thirty-day periods using intra-oral devices, with a week’s interval in between. Four experimental treatment procedures and one control were randomly assigned to the volunteers’ specimens: Group I, no treatment, control; Group II, artificial caries process; Group III, same treatment as Group II, but sealed with Delton (Dentsply); Group IV, same treatment as Group II, but sealed with Fuji IX (GC Corporation - Japan); Group V, same treatment as Group II and no sealing. Groups I and II were not submitted to the oral environment and served as controls. After a period of 30 days in the oral environment, the specimens were removed from the devices, embedded in acrylic resin, ground flat and polished. Then, Knoop hardness tests were performed, with a 25 g static load applied for 15 seconds. The measurements were made from the base of the fissure up to an opening of 600 µm, pre-established between the inclines of the cusps. Three indentations were then made, located at 25, 75, and 125 µm in depth from the outer enamel margin and 100 µm apart from each other (Micromet 2003). The Brieger F and Bonferroni’s tests were applied to the measurements. It was concluded that sealing with the glass ionomer cement Fuji IX was capable of making the enamel of pits and fissures more resistant by increasing the value of Knoop hardness.

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.

Use of sonic waves in bubble formation, microhardness and fluoride release of a high‐viscosity glass‐ionomer cement

2019 ◽  
Vol 10 (4) ◽  
Author(s):  
Nallu Gomes Lima Hironaka ◽  
Juliana Quintino Trizzi ◽  
Natália Miwa Yoshida ◽  
Jaime Aparecido Cury ◽  
Cinthia Pereira Machado Tabchoury ◽  
...  
Keyword(s):  
Bubble Formation ◽  
Glass Ionomer Cement ◽  
High Viscosity ◽  
Fluoride Release ◽  
Glass Ionomer ◽  
Sonic Waves ◽  
Ionomer Cement

Effects of extraction media upon fluoride release from a resin-modified glass-ionomer cement

1998 ◽  
Vol 2 (3) ◽  
pp. 143-146 ◽  
Author(s):  
W. Geurtsen ◽  
P. Bubeck ◽  
G. Leyhausen ◽  
F. Garcia-Godoy
Keyword(s):  
Glass Ionomer Cement ◽  
Fluoride Release ◽  
Glass Ionomer ◽  
Resin Modified Glass Ionomer ◽  
Ionomer Cement

scholarly journals Glass Ionomer Cement Modified by Resin with Incorporation of Nanohydroxyapatite: In Vitro Evaluation of Physical-Biological Properties

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1412 ◽  
Author(s):  
Luis Eduardo Genaro ◽  
Giovana Anovazzi ◽  
Josimeri Hebling ◽  
Angela Cristina Cilense Zuanon
Keyword(s):  
Cell Viability ◽  
Glass Ionomer Cement ◽  
Biological Properties ◽  
Glass Ionomer ◽  
Future Studies ◽  
Resin Modified Glass Ionomer ◽  
Restorative Materials ◽  
Ionomer Cement ◽  
Scanning Electron

Resin-modified glass ionomer cement (RMGIC) has important properties. However, like other restorative materials, it has limitations such as decreased biocompatibility. The incorporation of nanoparticles (NP) in the RMGIC resulted in improvements in some of its properties. The aim of this study was to evaluate the physical-biological properties of RMGIC with the addition of nanohydroxyapatite (HANP). Material and Methods: Vitremer RMGIC was used, incorporating HANP by amalgamator, vortex and manual techniques, totaling ten experimental groups. The distribution and dispersion of the HANP were evaluated qualitatively by field emission scanning electron microscope (SEM-FEG). The evaluation of image porosity (SEM-FEG) with the help of imageJ. Cell viability 3-(4,5-dimethylthiazol-2yl)-2,5-diphenyl tetrazoline bromide (MTT) and cell morphology analyses were performed on MDPC-23 odontoblastoid cells at 24 and 72 h. Results: It was possible to observe good dispersion and distribution of HANP in the samples in all experimental groups. The incorporation of 5% HANP into the vortex stirred RMGIC resulted in fewer pores. The increase in the concentration of HANP was directly proportional to the decrease in cytotoxicity. Conclusions: It is concluded that the use of a vortex with the incorporation of 5% HANP is the most appropriate mixing technique when considering the smallest number of pores inside the material. A higher concentration of HANP resulted in better cell viability, suggesting that this association is promising for future studies of new restorative materials.

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