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

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.

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

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.

scholarly journals Advances in glass-ionomer cements

2006 ◽  
Vol 14 (spe) ◽  
pp. 3-9 ◽  
Author(s):  
Carel Leon Davidson
Keyword(s):  
Glass Ionomer Cement ◽  
Minimal Invasive ◽  
Composite Resins ◽  
Restorative Material ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Tooth Structure ◽  
Ionomer Cement

This article describes the properties, advances and shortcomings of glass-ionomer cement as a restorative material. The adhesion of glass-ionomer to tooth structure is less technique sensitive than composite resins and its quality increases with time. Therefore glass-ionomer might turn out to the more reliable restorative material in minimal invasive dentistry based on adhesive techniques.

Reactions in Glass Ionomer Cements

1974 ◽  
Vol 53 (6) ◽  
pp. 1408-1413 ◽  
Author(s):  
Stephen Crisp ◽  
Alan D. Wilson
Keyword(s):  
Metal Complex ◽  
Polyacrylic Acid ◽  
Glass Ionomer Cement ◽  
Considerable Importance ◽  
Acid Solutions ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Cement Powder ◽  
Ionomer Cement

The initial stages of the reaction between the glass ionomer cement powder and polyacrylic acid solutions (aluminosilicate polyacrylate cement) are described. Polyacrylic acid rapidly decomposes the ion-leachable powder, possibly aided by some metal comPlex-forming function. The amount of fluoride extracted, which is related to its molecular condition in the glass, is of considerable importance.

scholarly journals Composites Associated with Pulp-Protection Material: Color-Stability Analysis after Accelerated Artificial Aging

2010 ◽  
Vol 04 (01) ◽  
pp. 006-011 ◽  
Author(s):  
Diogo Rodrigues Cruvinel ◽  
Lucas da Fonseca Roberti Garcia ◽  
Simonides Consani ◽  
Fernanda de Carvalho Panzeri Pires-de-Souza
Keyword(s):  
Artificial Aging ◽  
Glass Ionomer Cement ◽  
Color Stability ◽  
Color Variation ◽  
Control Group ◽  
Glass Ionomer ◽  
Before And After ◽  
Material Composite ◽  
Ionomer Cement ◽  
Material Concept

ABSTRACTObjectives: This study assessed the color stability of two composites associated with two pulp protectors submitted to accelerated artificial aging (AAA).Methods: 60 test specimens were made with 0.5 mm of protection material (calcium hydroxide - CH or glass ionomer cement - GIC) and 2.5 mm of restoration material (Concept or QuixFil) and divided into 3 groups (n=10) according to the type of protection material/composite, and the control group (no protection). After polishing, color readings were obtained with a spectrophotometer (PCB 6807 Byk Gardner) before and after AAA for 384 hours, and L*, a*, and b* coordinates and total color variation (ΔE) were analyzed (2-way ANOVA, Bonferroni, α=05).Results: Composites placed on CH presented lower L* levels than those on GIC, which presented higher L* values than the control group and lower b* values than those of the CH group. The Concept composite presented higher ΔE levels for all groups, differing statistically from QuixFil, except when placed on GIC.Conclusions: It was concluded that the protection material could affect the color stability and AAA is a factor that enhances this effect, depending on the type of composite used. (Eur J Dent 2010;4:6-11)

Surface Hardness Properties of Resin-Modified Glass Ionomer Cements and Polyacid-Modified Composite Resins

2004 ◽  
Vol 5 (4) ◽  
pp. 42-49 ◽  
Author(s):  
Yusuf Ziya Bayindir ◽  
Mehmet Yildiz
Keyword(s):  
Glass Ionomer Cement ◽  
Water Storage ◽  
Surface Hardness ◽  
Composite Resins ◽  
Bottom Surface ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Resin Modified Glass Ionomer ◽  
Hardness Values ◽  
Ionomer Cement

Abstract In this study the top and bottom surface hardness of two polyacid-modified composite resins (PMCRs), one resin-modified glass ionomer cement (RMGIC), and one composite resin were evaluated. The affect of water storage on their hardness was also investigated. The study was conducted using four different groups, each having five specimens obtained from fiberglass die molds with a diameter of 5 mm and a height of 2 mm. Measurements were made on the top and bottom surface of each specimen and recorded after 24 hours and again at 60 days. All tested materials showed different hardness values, and the values of top surfaces of the specimens were found to be higher than the bottom surface in all test groups. There was no statistical difference in the Vickers hardness (HV) values when the test specimens were kept in water storage. In conclusion Hytac displayed microhardness values higher than Vitremer and Dyract. We found the order of HV values to be Surfil > Hytac > Dyract > Vitremer, respectively. Vitremer presented the lowest microhardness level and Surfil the highest. Citation Bayindir YZ, Yildiz M. Surface Hardness Properties of Resin-Modified Glass Ionomer Cements and Polyacid-Modified Composite Resins. J Contemp Dent Pract 2004 November;(5)4:042-049.

scholarly journals Compressive strength of glass ionomer cements using different specimen dimensions

2007 ◽  
Vol 21 (3) ◽  
pp. 204-208 ◽  
Author(s):  
André Mallmann ◽  
Jane Clei Oliveira Ataíde ◽  
Rosa Amoedo ◽  
Paulo Vicente Rocha ◽  
Letícia Borges Jacques
Keyword(s):  
Compressive Strength ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Strength Test ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Universal Testing ◽  
Resin Modified Glass Ionomer ◽  
Compressive Strength Test ◽  
Ionomer Cement

The purpose of this study was to evaluate the compressive strength of two glass ionomer cements, a conventional one (Vitro Fil® - DFL) and a resin-modified material (Vitro Fil LC® - DFL), using two test specimen dimensions: One with 6 mm in height and 4 mm in diameter and the other with 12 mm in height and 6 mm in diameter, according to the ISO 7489:1986 specification and the ANSI/ADA Specification No. 66 for Dental Glass Ionomer Cement, respectively. Ten specimens were fabricated with each material and for each size, in a total of 40 specimens. They were stored in distilled water for 24 hours and then subjected to a compressive strength test in a universal testing machine (EMIC), at a crosshead speed of 0.5 mm/min. The data were statistically analyzed using the Kruskal-Wallis test (5%). Mean compressive strength values (MPa) were: 54.00 ± 6.6 and 105.10 ± 17.3 for the 12 mm x 6 mm sample using Vitro Fil and Vitro Fil LC, respectively, and 46.00 ± 3.8 and 91.10 ± 8.2 for the 6 mm x 4 mm sample using Vitro Fil and Vitro Fil LC, respectively. The resin-modified glass ionomer cement obtained the best results, irrespective of specimen dimensions. For both glass ionomer materials, the 12 mm x 6 mm matrix led to higher compressive strength results than the 6 mm x 4 mm matrix. A higher variability in results was observed when the glass ionomer cements were used in the larger matrices.

scholarly journals Effect of Hydroxyapatite on Surface Roughness of Zirconomer, and Conventional and Resin-Modified Glass Ionomers

2021 ◽  
Author(s):  
Farahnaz Sharafeddin ◽  
Somaye Bahrani
Keyword(s):  
Surface Roughness ◽  
Glass Ionomer Cement ◽  
Study Groups ◽  
Distilled Water ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Resin Modified Glass Ionomer ◽  
Dental Restorative ◽  
One Way Anova ◽  
Ionomer Cement

Objectives: Glass ionomer cements (GICs) are among the most popular dental restorative materials, but their use is limited due to their clinical disadvantages. Many efforts have been made to improve the properties of these materials by adding various fillers. Incorporation of hydroxyapatite (HA) into the GICs is considered to improve the physical properties of restorations, and may prevent treatment failure. This study aimed to evaluate the surface roughness (Ra) of a conventional glass ionomer cement (CGIC), a resin-modified glass ionomer (RMGI) and a Zirconomer with and without micro-hydroxyapatite (µHA). Materials and Methods: This experimental study was conducted on 6 groups (n=10) including CGIC, CGIC + µHA, RMGI, RMGI + µHA, Zirconomer, and Zirconomer + µHA. A total of 60 disc-shaped samples (6 mm × 2 mm) were prepared in plastic molds and were stored in distilled water for 24 h. After polishing of the specimens, their Ra was measured by a profilometer in micrometers (µm). The data were analyzed using two and one-way ANOVA, Tukey's HSD test, and independent t-test. Results: Incorporation of µHA resulted in statistically significant differences in Ra between the study groups (P<0.05). Following the incorporation of µHA, the Ra significantly decreased in CGIC (P=0.013) and Zirconomer (P=0.003). However, addition of µHA to RMGI resulted in a significant increase in its Ra (P<0.001). Conclusion: Addition of µHA decreased the Ra of Zirconomer and CGIC, and increased the surface roughness of RMGI samples.

Adhesiveness of Various Glass Ionomer Cements in Cavities Treated with Carisolv

2012 ◽  
Vol 37 (2) ◽  
pp. 183-187 ◽  
Author(s):  
Y Yamada ◽  
Y Masuda ◽  
Y Kimura ◽  
M Hossain ◽  
A Manabe ◽  
...  
Keyword(s):  
Glass Ionomer Cement ◽  
Permanent Teeth ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Group 4 ◽  
Caries Treatment ◽  
Resin Modified Glass Ionomer ◽  
Acceptable Method ◽  
Caries Removal ◽  
Ionomer Cement

Objective: The purpose of this study was to investigate the adhesion of glass ionomer cements to dentin and the effect of pretreatment using Carisolv. Study design: Forty extracted permanent teeth with caries were used for this study. All lesions were removed using the Carisolv system and teeth were divided into eight groups. Groups 1 to 4 were filled with three types of conventional glass ionomer cements and a resin modified glass ionomer cement. Group 8 was restored with composite resin. In the remaining three groups (Groups 5 to 7), several pretreatment procedures, including EDTA and dentin primer application and a combination of these, were performed before restoring with resin modified glass ionomer cement. All restorations were thermocycled, and microleakage tests were performed on all teeth. Results: There were no statistical differences among Groups 1, 2 and 3 or between Groups 4 and 8. However, Groups 1 to 3 had higher microleakage levels than Groups 4 and 8. Groups 5 to 7 showed similar leakage levels as Group 4. Conclusion: Pretreatment with EDTA or dentin primer did not improve bonding ability. Combination of caries removal using Carisolv and a resin modified glass ionomer cement restoration without pretreatment seems to be an acceptable method for caries treatment.

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