scholarly journals Effect of chlorhexidine gluconate on porosity and compressive strength of a glass ionomer cement

2014 ◽  
Vol 43 (4) ◽  
pp. 236-240 ◽  
Author(s):  
Luana Mafra MARTI ◽  
Elcilaine Rizzato AZEVEDO ◽  
Margareth da MATA ◽  
Elisa Maria Aparecida GIRO ◽  
Angela Cristina Cilense ZUANON
Keyword(s):  
Compressive Strength ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Study Groups ◽  
Dental Practice ◽  
Glass Ionomer ◽  
Significance Level ◽  
Tukey Test ◽  
Compressive Strength Test ◽  
Ionomer Cement

INTRODUCTION:For presenting wide antibacterial activity, chlorhexidine (CHX) has been extensively used in dentistry and can be easily incorporated into the glass ionomer cement (GIC) and consequently released into the oral cavity.AIM: The aim of this study was porosity and compression strength of a GIC, that was added to different concentrations of CHX.MATERIAL AND METHOD: Specimens were prepared with GIC (Ketac Molar Esaymix) and divided into 4 groups according to the concentration of CHX: control, 0.5% and 1% and 2% (n = 10). For analysis of pores specimens were fractured with the aid of hammer and chisel surgical, so that the fracture was performed in the center of the specimens, dividing it in half and images were obtained from a scanning electron microscope (SEM) analyzed in Image J software. The compressive strength test was conducted in a mechanical testing machine (EMIC - Equipment and Testing Systems Ltd., Joseph of the Pines, PR, Brazil). Statistical analysis was performed by ANOVA, Tukey test. Significance level of 5%.RESULT: No statistically significant changes between the study groups was observed both for the number of pores as well as for the compressive strength.CONCLUSION: The use of GIC associated with CHX gluconate 1% and 2% is the best option to be used in dental practice.

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.

In Vitro Evaluation of Microleakage and Microhardness of Ethanolic Extracts of Propolis in Different Proportions Added to Glass Ionomer Cement

2016 ◽  
Vol 40 (2) ◽  
pp. 136-140 ◽  
Author(s):  
Mustafa Altunsoy ◽  
Mehmet Tanrıver ◽  
Uğur Türkan ◽  
Mehmet Emin Uslu ◽  
Sibel Silici
Keyword(s):  
Glass Ionomer Cement ◽  
Antibacterial Properties ◽  
Dental Practice ◽  
Glass Ionomer ◽  
Tukey Test ◽  
Ethanolic Extracts ◽  
Post Hoc ◽  
One Way Anova ◽  
Ionomer Cement

Objective: To evaluate the effect of ethanolic extracts of propolis (EEP) addition in different proportions to glass ionomer cement (GIC) on microleakage and microhardness of GIC. Study design: The cement was divided into four groups: one using the original composition and three with 10%, 25%, and 50% EEP added to the liquid and then manipulated. For microleakage assessment, sixty primary molars were randomly divided into four groups (n=15). Standard Class II cavities were prepared and then filled with EEP in different proportions added to GICs. Microleakage test was performed using a dye penetration method. The data were analyzed using one-way ANOVA and Mann - Whitney U tests (α = 0.05). Disc shaped specimens were prepared from the tested GIC to determine Vickers hardness (VHN). The data were analyzed using one-way ANOVA and post hoc Tukey test (α = 0.05). Results: There were no statistically significant differences between the groups in terms of microleakage (p > 0.05). There were statistically significant differences between the VHN values of groups (p < 0.05). Increasing addition of EEP to GIC statistically significantly increased VHN value of GIC (p < 0.05). Conclusions: The addition of EEP to GIC increased the microhardness of the GIC and did not adversely affect the microleakage. Thus, it might be used during routine dental practice due to its antibacterial properties

scholarly journals Compressive Strength of a Glass Ionomer Cement Under the Influence of Varnish Protection and Dietary Fluids

2018 ◽  
Vol 20 (3) ◽  
pp. 61-69
Author(s):  
L.O.L. Bohner DDS, MSc, Ph ◽  
L.H.M. Prates
Keyword(s):  
Compressive Strength ◽  
Orange Juice ◽  
Soft Drink ◽  
Glass Ionomer Cement ◽  
Distilled Water ◽  
Glass Ionomer ◽  
Immersion Period ◽  
Compressive Strength Test ◽  
Student’S T ◽  
Ionomer Cement

The objective of this study was to evaluate the compressive strength of a glass ionomer cement (GIC) under the influence of varnish protection and dietary fluids. Eighty cylindrical test specimens were made from GIC and distributed into four groups (G1, G2, G3, G4) according to the dietary fluid. Each group was further divided into subgroups A and B according to the presence or absence of varnish protection. The eight subgroup samples were stored in distilled water for 30 days and received the following treatments for 14 days: G2A: varnish protection and immersion in soft drink, G2B: no varnish protection and immersion in soft drink, G3A: varnish protection and immersion in orange juice, G3B: no varnish protection and immersion in orange juice, G4A: varnish protection and immersion in yogurt, G4B: no varnish protection and immersion in yogurt. The immersion procedure was performed three times a day, for 15 minutes at a time, for a total of 14 days. The samples from subgroups G1A (with varnish) and G1B (without varnish) were used as controls and stored in distilled water only for 30 days. The samples were submitted to a compressive strength test after the immersion period. The results were analyzed using the ANOVA 2, Tukey test (5%) and Student’s t-test (5%). There were no significant differences between the subgroups, except for the subgroup with varnish protection and immersion in orange juice, which showed reduced GIC compressive strength.

Does Addition of Propolis to Glass Ionomer Cement Alter its Physicomechanical Properties? An in Vitro Study

2016 ◽  
Vol 40 (5) ◽  
pp. 400-403 ◽  
Author(s):  
P Subramaniam ◽  
KL Girish Babu ◽  
G Neeraja ◽  
S Pillai
Keyword(s):  
Compressive Strength ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
In Vitro Study ◽  
Physicomechanical Properties ◽  
Control Group ◽  
Glass Ionomer ◽  
Experimental Group ◽  
Ionomer Cement

Propolis is a natural resinous substance produced by honey bees. The antimicrobial effects of glass ionomer cement have been shown to improve with the addition of propolis; however its effect on the physicomechanical properties of the cement is not known. Aim: The purpose of this study was to evaluate the compressive strength and solubility of conventional restorative glass ionomer cement following the addition of propolis. Study design: Twenty half cylindrical samples were prepared with conventional restorative glass ionomer cement formed the control group. Another twenty samples were prepared with propolis added to conventional restorative glass ionomer cement formed the experimental group. The compressive strength was assessed using universal testing machine. To assess solubility, the samples were immersed in deionised water at room temperature, for 7 days. The solubility was measured as a difference in the weight of the sample; prior to immersion and following immersion at the end of each day. Results: The control group had a significantly higher mean compressive strength of 146.26 Mpa as compared to the experimental group (135.06 Mpa). The solubility between the groups was significant. Conclusion: In comparison to the control group, incorporation of propolis to conventional restorative glass ionomer cement decreased the compressive strength significantly. The solubility of the cement in the experimental group increased significantly over 7day period as compared to the control group.

Comparative evaluation of compressive strength of esthetic restorative materials

2018 ◽  
Vol 14 (1) ◽  
pp. 24
Author(s):  
Dr. Sazan Sherdil Saleem
Keyword(s):  
Compressive Strength ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Group Iii ◽  
Group I ◽  
Significant Difference ◽  
Resin Modified Glass Ionomer ◽  
Restorative Materials ◽  
Ionomer Cement

The present study was aimed to evaluate and compare the compressive strength ofconventional glass ionomer cement with resin modified glass ionomer, compomer andmicrohybrid composite. A total of 40 specimens of esthetic restorative materials werefabricated using customized cylindrical teflon mould measuring 6mm height and 4mmdiameter and were grouped with ten specimens in each group, Group I: Conventionalglass ionomer cement (Fuji II). Group II: Resin modified glass ionomer (Fuji II LC).Group III: Compomer (Dyract AP) and Group IV: Microhybrid composite resin(Tetric Ceram).They were covered with Mylar strip and were cured using LED lightcuring unit. Compressive strength was evaluated using Universal testing machine. Theresult showed that there were a significant difference among the groups in whichTetric Ceram showed highest compressive strength and Fuji II showed the leastcompressive strength

Nanoparticles as void fillers in glass ionomer cement for enhanced physicomechanical properties

2020 ◽  
Vol 10 (11) ◽  
pp. 1960-1964
Author(s):  
Mansour K. A. Assery ◽  
Abdulrahman Alshubat ◽  
AlWaleed Abushanan ◽  
Nawaf Labban ◽  
Mohamed Hashem
Keyword(s):  
Vickers Microhardness ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Study Groups ◽  
Control Group ◽  
Glass Ionomer ◽  
Universal Testing ◽  
Microhardness Testing ◽  
Diametral Tensile Strength ◽  
Ionomer Cement

The study evaluated the addition of silver (Ag) and titanium dioxide (TiO2) nanoparticles to conventional glass ionomer cement (GIC), considering compressive strength (CS), diametral tensile strength (DTS), flexural strength (FS), and hardness. Ag and TiO2 nanoparticles were blended into the powder of a commercially available GIC restorative material at 5% (w/w). Unblended powder was used as a control. One hundred twenty samples were prepared from two study groups and one control group (n = 10). CS, DTS, and FS were evaluated using a universal testing machine, while hardness was measured by Vickers microhardness testing. The data obtained were analyzed using One-way analysis of variance and the Tukey?s test (p < 0.05). GIC containing Ag and TiO2 nanoparticles significantly improved the CS, DTS, and hardness compared to the control group (p < 0.05). However, the FS was not much affected by the addition of either of the nanoparticles (p >0.05). TiO2 blended GIC demonstrated significantly higher CS (154.20+2.38) and DTS (13.2±0.5 MPa) compared to control 117.2±1.2 MPa and 7.2 ±0.8 MPa, respectively. While Blend of GIC+Ag nanoparticles showed the highest FS (29.0±0.7 MPa). Additionally, the blend of GIC+TiO2 exhibited the highest hardness (90.4±1.1 VHN). Ag and TiO2 blended GICs might guarantee their use in occlusal or higher stress-bearing areas.

scholarly journals Comparison of Microhardness and Compressive Strength of Alkasite and Conventional Restorative Materials

2020 ◽  
Vol 47 (3) ◽  
pp. 320-326
Author(s):  
Kunho Lee ◽  
Jongsoo Kim ◽  
Jisun Shin ◽  
Miran Han
Keyword(s):  
Compressive Strength ◽  
Vickers Microhardness ◽  
Composite Resin ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Microhardness Test ◽  
Universal Testing ◽  
Restorative Materials ◽  
Ionomer Cement

The aim of this study was to compare compressive strength and microhardness of recently introduced alkasite restorative materials with glass ionomer cement and flowable composite resin.For each material, 20 samples were prepared respectively for compressive strength and Vickers microhardness test. The compressive strength was measured with universal testing machine at crosshead speed of 1 mm/min. And microhardness was measured using Vickers Micro hardness testing machine under 500 g load and 10 seconds dwelling time at 1 hour, 1 day, 7 days, 14 days, 21 days and 35 days.The compressive strength was highest in composite resin, followed by alkasite, and glass ionomer cement. In microhardness test, composite resin, which had no change throughout experimental periods, showed highest microhardness in 1 hour, 1 day, and 7 days measurement. The glass ionomer cement showed increase in microhardness for 7 days and no difference was found with composite resin after 14 days measurement. For alkasite, maximum microhardness was measured on 14 days, but showed gradual decrease.

scholarly journals Influence of photobio-modulation with an Er,Cr: YSGG laser on dentin adhesion bonded with bioactive and resin-modified glass ionomer cement

2019 ◽  
Vol 17 (4) ◽  
pp. 228080001988069
Author(s):  
Fahad Alkhudhairy ◽  
Mustafa Naseem ◽  
Zeeshan H Ahmad ◽  
Abrar N Alnooh ◽  
Fahim Vohra
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Type Specimens ◽  
Significance Level ◽  
Resin Modified Glass Ionomer ◽  
Post Hoc ◽  
Ionomer Cement ◽  
Group 1

The aim of the present study was to evaluate the shear bond strength (SBS) of bioactive cement (BAC) in comparison to conventional dual cure resin-modified glass ionomer cement (RMGIC) with Er,Cr:YSGG laser (ECL) dentin photo biomodulation. Methods: One hundred and twenty extracted human molars were allocated in eight groups ( n = 15) based on surface conditioning and cement type. Specimens of groups 2 and 6 were conditioned with ECL whereas, groups 3 and 7 were treated with ECL + ethylenediamine tetra acetic acid (EDTA). Specimens in groups 4 and 8 were surface conditioned by ECL + EDTA + Tetric-N-Bond, and groups 1 and 5 were considered as control (non-surface treated). Cement build-ups were performed on the surface-treated dentin with BAC (groups 1–4) and RMGIC (groups 5–8). A universal testing machine was used to measure the SBS and the mode of failure was evaluated using a stereomicroscope. Statistical analysis was performed using an analysis of variance and Tukey’s post hoc test, at a significance level of p < 0.001. Results: The highest SBS values were observed in group 8, ECL + EDTA + Tetric-N-Bond + RMGIC (21.54 ± 3.524 MPa) and the lowest SBS values were displayed by group 1, with no surface treatment and BAC application (11.99 ± 0.821 MPa). The majority of failures were found to be mixed in lased dentin-treated dentin surfaces. BAC when bonded to dentin surfaces conditioned with ECL showed lower SBS in comparison to RMGIC. Conclusion: Conditioning of dentin with ECL and a bonding agent (Tetric-N-bond) improved bond strength scores for BAC and RMGIC. Use of EDTA improved bond strength values when bonded to BAC and RMGIC; however, this improvement was not statistically significant.

The Effect of Incorporating Lithium Fluoride on the Compressive Strength and Diametric Tensile Strength of Glass Ionomer Cement

2011 ◽  
Vol 264-265 ◽  
pp. 508-512
Author(s):  
Ammar A. Mustafa ◽  
Khalid A. S. Al-Khateeb ◽  
Ahmad Faris Ismail
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Lithium Fluoride ◽  
Artificial Saliva ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Experimental Glass ◽  
Diametral Tensile Strength ◽  
Ionomer Cement

Experimental glass ionomer cement was prepared for the purpose of this study. Twenty disk specimens (16mm diameter x 10mm height) of test-GIC were prepared for the diametral tensile strength (DTS) test and twenty cylindrical specimens (6 mm diameter x 16mm height) were prepared for the compressive strength (CS) test. Specimens were stored in an artificial saliva at 37º C and (50±10%) of relative humidity in an incubator until testing. Five specimens of each GIC were submitted to CS and DTS test in each period, namely 1 hour, 24 hours, 7 days and 28 days. The specimens were tested in a Universal Testing Machine (Instron 1122, Instron corp., High Wycombe, U.K.) at a crosshead speed of 1.0mm/min for CS and 0.5mm/min for the DTS test until failure occurred. The results have revealed that incorporation of lithium fluoride in the formula of the test GIC might impart an increase in the mechanical properties of the GICs

scholarly journals Compressive Strength of Conventional Glass Ionomer Cement Modified with TiO2 Nano-Powder and Marine-Derived HAp Micro-Powder

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4964
Author(s):  
Ana Ivanišević ◽  
Valentina Brzović Rajić ◽  
Ana Pilipović ◽  
Matej Par ◽  
Hrvoje Ivanković ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Sem Analysis ◽  
Nano Particles ◽  
Control Group ◽  
Glass Ionomer ◽  
Nano Powder ◽  
Materials Used ◽  
Ionomer Cement

The aim of this research was to investigate the compressive strength (CS), breaking strength (BS), and compressive modulus (CM) of conventional glass ionomer cement (GIC) modified with TiO2 nano particles, marine-derived hydroxyapatite (md-HAp) microparticles (<45 µm), and a combination of TiO2 NP and md-HAp particles. The materials used in the study were conventional GIC Fuji IX GP Extra (GC Corporation, Tokyo, Japan), TiO2 powder P25 (Degussa, Essen, Germany), and HAp synthesized from cuttlefish bone and ground in a mortar to obtain md-HAp powder. md-HAp was characterized using FTIR and SEM analysis. There were four groups of GIC samples: (i) Fuji IX control group, (ii) powder modified with 3 wt% TiO2, (iii) powder modified with 3 wt% HAp, and (iv) powder modified with 1.5 wt% TiO2 + 1.5 wt% HAp. Measurements were performed in a universal testing machine, and CS, BS, and CM were calculated. Statistical analysis was performed using ANOVA and Tukey’s tests. CS, BS, and CM differed significantly between the Fuji IX control group and all experimental groups while differences between the experimental groups were not statistically significant. The addition of TiO2 NP, md-HAp micro-sized particles, and a combination of TiO2 and md-HAp reduced the CS, BS, and CM of conventional GICs when mixed at the powder/liquid (p/l) ratio recommended by the manufacturer.

Sign in / Sign up

Export Citation Format

Share Document