The effect of chitosan derived silver nanoparticles on mechanical properties, color stability of glass ionomer luting cements

Introduction. Glass ionomer cements (GICs) are commonly used for cementation of indirect restorations. However, one of their main drawbacks is their inferior mechanical properties. Aim. Compositional modification of conventional glass ionomer luting cements by incorporating two types of all-ceramic powders in varying concentrations and evaluation of their film thickness, setting time, and strength. Material & Methods. Experimental GICs were prepared by adding different concentrations of two all-ceramic powders (5%, 10, and 15% by weight) to the powder of the glass ionomer luting cements, and their setting time, film thickness, and compressive strength were determined. The Differential Scanning Calorimetry analysis was done to evaluate the kinetics of the setting reaction of the samples. The average particle size of the all-ceramic and glass ionomer powders was determined with the help of a particle size analyzer. Results. A significant increase in strength was observed in experimental GICs containing 10% all-ceramic powders. The experimental GICs with 5% all-ceramic powders showed no improvement in strength, whereas those containing 15% all-ceramic powders exhibited a marked decrease in strength. Setting time of all experimental GICs progressively increased with increasing concentration of all-ceramic powders. Film thickness of all experimental GICs was much higher than the recommended value for clinical application. Conclusion. 10% concentration of the two all-ceramic powders can be regarded as the optimal concentration for enhancing the glass ionomer luting cements’ strength. There was a significant increase in the setting time at this concentration, but it was within the limit specified by ISO 9917–1:2007 specifications for powder/liquid acid-base dental cements. Reducing the particle size of the all-ceramic powders may help in decreasing the film thickness, which is an essential parameter for the clinical performance of any luting cement.

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EFFECT OF ADDITIONS SILVER NANOPARTICLES ON RESIN MODIFIED GLASS - IONOMER MECHANICAL PROPERTIES

International Journal of Advanced Research ◽

10.21474/ijar01/10143 ◽

2019 ◽

Vol 7 (12) ◽

pp. 188-197

Author(s):

Abdullah S ◽

◽

Alahmari Muhannad S ◽

Alhurayti Mohamed I Ebrahim ◽

Mohammed K Fahmi

Keyword(s):

Mechanical Properties ◽

Silver Nanoparticles ◽

Glass Ionomer ◽

Resin Modified Glass Ionomer

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

Journal of Biomimetics Biomaterials and Biomedical Engineering ◽

10.4028/www.scientific.net/jbbbe.48.99 ◽

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.

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

International Journal of Dentistry ◽

10.1155/2020/7808535 ◽

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.

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The impact of silver nanoparticles integration on biofilm formation and mechanical properties of glass ionomer cement

Journal of Esthetic and Restorative Dentistry ◽

10.1111/jerd.12353 ◽

2017 ◽

Vol 30 (2) ◽

pp. 146-152 ◽

Cited By ~ 4

Author(s):

Noha A. El-Wassefy ◽

Rasha H. El-Mahdy ◽

Naglaa R. El-Kholany

Keyword(s):

Mechanical Properties ◽

Silver Nanoparticles ◽

Biofilm Formation ◽

Glass Ionomer Cement ◽

Glass Ionomer ◽

The Impact ◽

Ionomer Cement

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

Indian Journal of Public Health Research & Development ◽

10.37506/v10/i12/2019/ijphrd/192190 ◽

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

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Dental Applications of Carbon Nanotubes

Molecules ◽

10.3390/molecules26154423 ◽

2021 ◽

Vol 26 (15) ◽

pp. 4423

Author(s):

Marco A. Castro-Rojas ◽

Yadira I. Vega-Cantu ◽

Geoffrey A. Cordell ◽

Aida Rodriguez-Garcia

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Oral Cavity ◽

Current Status ◽

Glass Ionomer ◽

Oral Infections ◽

Functional Behavior ◽

The Status ◽

Comprehensive Survey ◽

Dental Applications

Glass ionomer cements and resin-based composites are promising materials in restorative dentistry. However, their limited mechanical properties and the risk of bulk/marginal fracture compromise their lifespan. Intensive research has been conducted to understand and develop new materials that can mimic the functional behavior of the oral cavity. Nanotechnological approaches have emerged to treat oral infections and become a part of scaffolds for tissue regeneration. Carbon nanotubes are promising materials to create multifunctional platforms for dental applications. This review provides a comprehensive survey of and information on the status of this state-of-the-art technology and describes the development of glass ionomers reinforced with carbon nanotubes possessing improved mechanical properties. The applications of carbon nanotubes in drug delivery and tissue engineering for healing infections and lesions of the oral cavity are also described. The review concludes with a summary of the current status and presents a vision of future applications of carbon nanotubes in the practice of dentistry.

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