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

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 adding silica particles on certain properties of resin-modified glass-ionomer cement

2016 ◽  
Vol 10 (02) ◽  
pp. 225-229 ◽  
Author(s):  
Nayef H. Felemban ◽  
Mohamed I. Ebrahim
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Water Sorption ◽  
Water Solubility ◽  
Glass Ionomer Cement ◽  
Silica Particles ◽  
Type Ii ◽  
Glass Ionomer ◽  
Resin Modified Glass Ionomer ◽  
Ionomer Cement

ABSTRACT Objective: This study was conducted to evaluate the effect of incorporation of silica particles with different concentrations on some properties of resin-modified glass ionomer cement (RMGIC): Microleakage, compressive strength, tensile strength, water sorption, and solubility. Materials and Methods: Silica particle was incorporated into RMGIC powder to study its effects, one type of RMGIC (Type II visible light-cured) and three concentrations of silica particles (0.06, 0.08, and 0.1% weight) were used. One hundred and twenty specimens were fabricated for measuring microleakage, compressive strength, tensile strength, water sorption, and solubility. Statistical Analysis: One-way analysis of variance and Tukey's tests were used for measuring significance between means where P ≤ 0.05. Results: RMGIC specimens without any additives showed significantly highest microleakage and lowest compressive and tensile strengths. Conclusion: Silica particles added to RMGIC have the potential as a reliable restorative material with increased compressive strength, tensile strength, and water sorption but decreased microleakage and water solubility.

Controlled Drug Release Property of Nano-Porous Silica Micro Particles and their Cytocompatibility

2018 ◽  
Vol 782 ◽  
pp. 262-267
Author(s):  
Yuko Era ◽  
Eri Seitoku ◽  
Ko Nakanishi ◽  
Yosuke Bando ◽  
Koichi Nakamura ◽  
...  
Keyword(s):  
Drug Release ◽  
Glass Ionomer Cement ◽  
Porous Silica ◽  
Controlled Drug Release ◽  
Glass Ionomer ◽  
Drug Molecules ◽  
Micro Particles ◽  
Silica Microparticles ◽  
Model Drug ◽  
Ionomer Cement

In this study, we investigated in cytocompativility and controlled release behavior of a model drug from nanoporous silica microparticles (NPSM). When Mouse osteoblastic cells (MC3T3-E1) were exposed to NPMSs, they indicated excellent cell viability. From NPSM contained in dental glass ionomer cement (NPMS-GIC), they can release cationic model drug molecules gradually in water for 2 weeks when they were contained in GIC. In contrast, GIC without NPSM specimens released the molecule only a couple of days. In the case of inionic molecules, their release were alos determined only a couple of days. These results suggest that NPSM can be used as a sustainable drug-release system in dental and medical fields

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.

Microleakage of class II restoration with zirconia inlay: An in vitro study

2019 ◽  
pp. 61-67
Author(s):  
Xuan Anh Ngoc Ho ◽  
Anh Chi Phan ◽  
Toai Nguyen
Keyword(s):  
Glass Ionomer Cement ◽  
Class Ii ◽  
Resin Cement ◽  
Glass Ionomer ◽  
Resin Modified Glass Ionomer ◽  
Group 2 ◽  
Self Etch ◽  
Ionomer Cement ◽  
Group 1 ◽  
Composite Restoration

Background: Class II restoration with zirconia inlay is concerned by numerous studies about the luting coupling between zirconia inlay and teeth. The present study was performed to evaluate the microleakage of Class II zirconia inlayusing two different luting agents and compare to direct restoration using bulk fill composite. Aims: To evaluate the microleakage of Class II restorations using three different techniques. Materials and methods: The study was performed in laboratory with three groups. Each of thirty extracted human teeth was prepared a class II cavity with the same dimensions, then these teeth were randomly divided into 3 groups restored by 3 different approaches. Group 1: zirconia inlay cemented with self-etch resin cement (Multilink N); Group 2: zirconia inlay cemented with resin-modified glass ionomer cement (Fuji Plus); Group 3: direct composite restoration using bulk fill composite(Tetric N-Ceram Bulk Fill). All restorations were subjected to thermal cycling (100 cycles 50C – 55 0C), then immersed to 2% methylene blue solution for 24 hours. The microleakage determined by the extent of dye penetration along the gingival wall was assessed using two methods: quantitative and semi-quantitative method. Results: Among three types of restorations, group 1 demonstrated the significantly lower rate of leakage compared to the others, while group 2 and 3 showed no significant difference. Conclusion: Zirconia inlay restoration cemented with self-etch resin cement has least microleakage degree when compare to class II zirconia inlay restoration cemented with resin-modified glass ionomer cement and direct composite restoration using bulk fill composite. Key words: inlay, zirconia ceramic, class II restoration, microleakage.

Comparative Evaluation of Mechanical Properties of Ceramic Reinforced Glass Ionomer Cement and Type IX GIC:An Invitro Study

2019 ◽  
Vol 10 (12) ◽  
pp. 35
Author(s):  
Nagalakshmi Chowdhary ◽  
N. K. Kiran ◽  
A. Lakshmi Priya ◽  
Rajashekar Reddy ◽  
Arvind Sridhara ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Comparative Evaluation ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Ionomer Cement

scholarly journals Effects of ionizing radiation on surface properties of current restorative dental materials

2021 ◽  
Vol 32 (6) ◽  
Author(s):  
Débora Michelle Gonçalves de Amorim ◽  
Aretha Heitor Veríssimo ◽  
Anne Kaline Claudino Ribeiro ◽  
Rodrigo Othávio de Assunção e Souza ◽  
Isauremi Vieira de Assunção ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Surface Properties ◽  
Resin Composite ◽  
Dental Materials ◽  
Glass Ionomer Cement ◽  
Contact Angles ◽  
Glass Ionomer ◽  
Post Radiation ◽  
Restorative Dental Materials ◽  
Ionomer Cement

AbstractTo investigate the impact of radiotherapy on surface properties of restorative dental materials. A conventional resin composite—CRC (Aura Enamel), a bulk-fill resin composite—BFRC (Aura Bulk-fill), a conventional glass ionomer cement—CGIC (Riva self cure), and a resin-modified glass ionomer cement—RMGIC (Riva light cure) were tested. Forty disc-shaped samples from each material (8 mm diameter × 2 mm thickness) (n = 10) were produced according to manufacturer directions and then stored in water distilled for 24 h. Surface wettability (water contact angle), Vickers microhardness, and micromorphology through scanning electron microscopy (SEM) before and after exposition to ionizing radiation (60 Gy) were obtained. The data were statistically evaluated using the two-way ANOVA and Tukey posthoc test (p < 0.05). Baseline and post-radiation values of contact angles were statistically similar for CRC, BFRC, and RMGIC, whilst post-radiation values of contact angles were statistically lower than baseline ones for CGIC. Exposition to ionizing radiation statistically increased the microhardness of CRC, and statistically decreased the microhardness of CGIC. The surface micromorphology of all materials was changed post-radiation. Exposure to ionizing radiation negatively affected the conventional glass ionomer tested, while did not alter or improved surface properties testing of the resin composites and the resin-modified glass ionomer cement tested.

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