Compressive Strength Evaluation of Gingival Composite Restoration Using Micro, Nano, and Hybrid Silica

2020 ◽  
Vol 55 (6) ◽  
Author(s):  
Arief Cahyanto ◽  
Ignes Nathania ◽  
Veni Takarini ◽  
Nina Djustiana ◽  
Zulia Hasratiningsih
Keyword(s):  
Compressive Strength ◽  
Testing Machine ◽  
Gingival Recession ◽  
Weight Percent ◽  
P Value ◽  
Restorative Material ◽  
Nano Silica ◽  
Strength Evaluation ◽  
Hybrid Silica ◽  
Micro Silica

Gingival composites are one of the gingival recession treatments, which can provide an aesthetic and non-invasive alternative. The compressive strength of gingival composite needs to be known as a benchmark of the restorative material. This study aims to develop and investigate the properties of gingival composite restorative materials using micro, nano, or hybrid silica. The experimental method was employed with one-way analysis of variance, using three different kinds of composite materials: micro, nano, and hybrid silica. Comparison of a matrix to filler ratio for three groups were 30:70, 50:50, 60:40 weight percent, respectively. The compressive strength evaluation was done using a universal testing machine with a 5.6 N load, continuously applied with a crosshead speed of 1.0 ± 0.25 mm/minute until a break or crack formed in the samples. The average results of the compressive strength test micro silica were 71.89 MPa, nano-silica 104.23 MPa, and hybrid silica 106.85 MPa. The p-value between the three groups was 0.001; between micro silica and hybrid silica was 0.001; between micro silica and nano-silica was 0.002, and between nano-silica and hybrid silica was 0.738. This study concluded a statistically significant compressive strength of gingival composite restorative material using micro, nano, or hybrid silica. The gingival composite with hybrid silica had the highest compressive strength among the three fillers.

scholarly journals A COMPARATIVE EVALUATION OF MICROLEAKAGE, COMPRESSIVE STRENGTH, FLEXURAL STRENGTH AND FLUORIDE RELEASE OF ZIRCONOMER AND KETAC SILVER: AN IN VITRO STUDY.

2020 ◽  
Vol 9 (4) ◽  
Author(s):  
CHARANTEJA VEMAGIRI ◽  
Uloopi KS ◽  
Vinay Chandrappa ◽  
Anusha Ch
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Testing Machine ◽  
In Vitro Study ◽  
Biological Properties ◽  
T Test ◽  
Fluoride Release ◽  
Restorative Material ◽  
Glass Ionomer

Background: A successful restorative material forms a better adhesion, resist the microleakage and releases fluoride. However, existing glass ionomer cements cannot be used as a posterior restorative material in stress bearing areas. A new ionomer called Zirconomer, zirconia reinforced glass ionomer claims to exhibit high physical and biological properties. Aim: To assess and compare the microleakage, compressive strength, flexural strength and fluoride release from zirconomer with ketac silver. Materials & Methods: On twenty caries free premolar teeth (10 per each group), a class v cavity was restored with zirconomer and ketac silver. The microleakage was assessed using dye penetration test and stereomicroscope. The compressive and flexural strengths of these materials were measured using Instron Universal testing machine. The amount of fluoride released from the modified ionomers at pH 5 and pH 7 was estimated using Orion fluoride specific electrode. The obtained data was then subjected to statistical analysis. Results: Data was analysed using paired t-test for intergroup comparisons and unpaired t-test for intragroup comparisons. The overall microleakage (0.5±0.48) of zirconomer was significantly less (p=0.000) compared to ketac silver (1.9±0.83). Zirconomer demonstrated a significant higher compressive strength (330.25±60.14), flexural strength (33.058±2.36) than ketac silver (p= 0.000). Zirconomer demonstrated high fluoride release from day 1 to day 7 at both pH 5 and pH 7. Conclusion: Zirconomer demonstrated better physical and biological properties compared with ketac silver.

scholarly journals Compressive Strength, Fluoride Release and Recharge of Giomer

2013 ◽  
Vol 2 (2) ◽  
pp. 28-37 ◽  
Author(s):  
SM Abdul Quader ◽  
M Shamsul Alam ◽  
AKM Bashar ◽  
Abdul Gafur ◽  
MA Al Mansur
Keyword(s):  
Compressive Strength ◽  
Resin Composite ◽  
Testing Machine ◽  
Fluoride Release ◽  
Restorative Material ◽  
Glass Ionomer ◽  
Universal Testing ◽  
Restorative Materials ◽  
High Fluoride ◽  
Glass Filler

Current restorative materials with high fluoride release generally have lower mechanical properties. Therefore they may not be as durable clinically as lower fluoride release materials, particularly in load bearing areas. The aim of the present study is to explore the fluoride release and recharging ability as well as its compressive strength of the newly developed material called Giomer. The name Giomer is a hybrid of the words Glass Ionomer and Composite. Giomer contain a revolutionary PRG (Pre Reacted Glass) filler technology. They have properties of both conventional Glass Ionomer (fluoride release and recharge) and resin Composite (excellent esthetics, easy polishability and biocompatibility). MATERIALS & METHODS: Seven disk specimens of Giomer, Compomer and Glass Ionomer restorative materials were prepared for measurement of fluoride release and recharge using Ion Chromatography (IC) anion analyzer machine. Another seven disk specimens of Giomer, Compomer and Composite restorative materials were prepared for measurement of compressive strength using Universal Testing Machine (UTM). RESULTS: The value of compressive strength of Giomer is greater than that of Composite and Compomer but the fluoride release capability of Giomer becomes low in comparison to Glass Ionomer but not significant in comparison to compomer. CONCLUSIONS: Giomer have high compressive strength (271 Mpa) and an initial fluoride (1.41 ppm) release. It also exhibit fluoride recharge capabilities. So, Giomer to be a better restorative material other than any fluoride releasing materials. DOI: http://dx.doi.org/10.3329/updcj.v2i2.15533 Update Dent. Coll. j: 2012; 2 (2): 28-37

scholarly journals Biomodification of a Class-V Restorative Material by Incorporation of Bioactive Agents

2019 ◽  
Vol 7 (4) ◽  
pp. 110 ◽  
Author(s):  
Tahani Binaljadm ◽  
Robert Moorehead ◽  
Thafar Almela ◽  
Kirsty Franklin ◽  
Lobat Tayebi ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Histological Examination ◽  
Chondroitin Sulphate ◽  
Glass Ionomer Cement ◽  
Biological Properties ◽  
Working Time ◽  
P Value ◽  
Restorative Material ◽  
Disc Space ◽  
Class V

Restoring subgingival class-V cavities successfully, demand special biological properties from a restorative material. This study aimed to assess the effects of incorporating bioactive materials to glass ionomer cement (GIC) on its mechanical and biological properties. Hydroxyapatite, chitosan, chondroitin sulphate, bioglass, gelatine and processed bovine dentin were incorporated into a GIC restorative material. Compressive strength, biaxial flexural strength (BFS), hardness, setting and working time measurements were investigated. Biocompatibility of the new materials was assessed using both monolayer cell cultures of normal oral fibroblasts (NOF) and TR146 keratinocytes, and a 3D-tissue engineered human oral mucosa model (3D-OMM) using presto-blue tissue viability assay and histological examination. Significant reduction in the compressive strength and BFS of gelatine-modified discs was observed, while chondroitin sulphate-modified discs had reduced BFS only (p value > 0.05). For hardness, working and setting times, only bioglass caused significant increase in the working time. NOF viability was significantly increased when exposed to GIC-modified with bovine dentine, bioglass and chitosan. Histological examination showed curling and growth of the epithelial layer toward the disc space, except for the GIC modified with gelatine. This study has highlighted the potential for clinical application of the modified GICs with hydroxyapatite, chitosan, bioglass and bovine dentine in subgingival class-V restorations.

scholarly journals Optimizing Compressive Strength of Micro- and Nano-silica Concrete by Statistical Method

2017 ◽  
Vol 3 (11) ◽  
pp. 1084 ◽  
Author(s):  
Mahsa Zarehparvar-Shoja ◽  
Hamid Eskandari-Naddaf
Keyword(s):  
Compressive Strength ◽  
Nano Particles ◽  
Nano Silica ◽  
Concrete Technology ◽  
Concrete Mix Design ◽  
Optimal Value ◽  
Two Factors ◽  
New Perspective ◽  
Cement Strength ◽  
Micro Silica

In recent years, the use of nano-particles to improve the properties of concrete has created a new perspective on concrete technology. Studies in this field indicate improved concrete properties and higher strength by adding nano and micro silica particles to concrete mixes. In this regard, 12 mixing designs with different amounts of these admixtures with three types of cement strength classes (525,425,325) and 36 cubic samples (10 × 10 × 10) were designed and tested to measure compressive strength, of which we have only used 6 mixing plans in this research. The purpose of this research is to present a new method for concrete mix design by optimizing principles. Therefore, in this paper, the Taguchi statistical methods and the factorial design of the optimal mixing plan for this type of concrete are used to reduce the number of experiments to predict the optimal composition of the materials. The results obtained from the MINITAB software show that the effect of combined micro-silica and nano-silica on the compressive strength is in one direction and the effect of these two factors is more than cement strength grade of the cement and also the optimal value for micro-silica and nano-silica are estimated to have an optimum amount of micro-silica and nano-silica of 95 and 38 grams, respectively.

scholarly journals Performance evaluation of nano-silica concrete

2020 ◽  
Vol 184 ◽  
pp. 01076
Author(s):  
Kakara S J Kumar ◽  
M V Seshagiri Rao ◽  
V Srinivasa Reddy ◽  
S Shrihari
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Performance Evaluation ◽  
Nano Silica ◽  
Interface Zone ◽  
Nano Sio2 ◽  
Concrete Quality ◽  
Micro Silica ◽  
Non Destructive ◽  
Non Destructive Techniques

In this paper, the study of the influence of nano-silica (nano-SiO2) on the properties of the interface between CSH gel and cement particles and its effect on nano-mechanical properties of the products at the interface zone was examined. In this paper M50 grade SCC mixes were developed using 5% micro-silica and various percentages of 0.5%, 1.0% and 1.5% nano-SiO2. For 1.0% nano-SiO2 addition to M50 grade SCC mix, the compressive strength is maximum. Similarly concrete quality using non-destructive techniques, water absorbtion capacity and porosity are also assessed.

Effect of nano silica on cement mortars containing micro silica

2019 ◽  
Vol 10 (2) ◽  
pp. 42 ◽  
Author(s):  
İlknur Bekem Kara ◽  
Ömer Furkan Durmuş
Keyword(s):  
Compressive Strength ◽  
Setting Time ◽  
High Energy ◽  
Environmental Benefits ◽  
Industrial Wastes ◽  
Cementitious Composites ◽  
Hardened Cement ◽  
Nano Silica ◽  
Cement Mortars ◽  
Micro Silica

The use of cement and concrete is becoming increasingly widespread all over the world. However, the high energy consumption required for the production of clinker and the greenhouse gas emissions generated during production negatively affect both the economy and the environment. In the studies conducted for many years, researchers have found that the substitution of various pozzolans with cement provides both technical advantages and environmental benefits. The use of pozzolans in cementitious composites provides advantages such as the improvement of the physical and mechanical properties of the material, the conservation of the environment and the economy in terms of the evaluation of industrial wastes. In recent years, studies on the use of nanoparticles in cementitious composites are positively. In this study, it was aimed to investigate the properties of fresh and hardened cement mortars using micro silica as pozzolan and nano silica as nanoparticle. For this purpose, four different cement pastes and mortars mixtures were prepared by substituting 0%, 1%, 2%, 3% nano SiO2 (silica) cement in mortar mixtures containing 5% micro silica. The effects of the nano silica on the micro silica-containing cement paste on the consistency and setting time were investigated. The mortar mixtures produced were subjected to flexural and compressive strength tests on days 7, 28 and 90th. SEM images of mortar mixtures were taken. As a result, it was found that 2% nano silica admixture of 5% micro silica containing cement admixture affects the flexural and compressive strength positively, whereas 2% nano silica admixture increased the flexural strength by 13% and compressive strength by 7%.

scholarly journals Mechanical Properties of the Composite Material consisting of β-TCP and Alginate-Di-Aldehyde-Gelatin Hydrogel and Its Degradation Behavior

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1303
Author(s):  
Michael Seidenstuecker ◽  
Thomas Schmeichel ◽  
Lucas Ritschl ◽  
Johannes Vinke ◽  
Pia Schilling ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Protein Concentration ◽  
Failure Load ◽  
Testing Machine ◽  
Experimental Period ◽  
Flow Chamber ◽  
Degradation Behavior ◽  
Gelatin Hydrogel ◽  
Universal Testing

This work aimed to determine the influence of two hydrogels (alginate, alginate-di-aldehyde (ADA)/gelatin) on the mechanical strength of microporous ceramics, which have been loaded with these hydrogels. For this purpose, the compressive strength was determined using a Zwick Z005 universal testing machine. In addition, the degradation behavior according to ISO EN 10993-14 in TRIS buffer pH 5.0 and pH 7.4 over 60 days was determined, and its effects on the compressive strength were investigated. The loading was carried out by means of a flow-chamber. The weight of the samples (manufacturer: Robert Mathys Foundation (RMS) and Curasan) in TRIS solutions pH 5 and pH 7 increased within 4 h (mean 48 ± 32 mg) and then remained constant over the experimental period of 60 days. The determination surface roughness showed a decrease in the value for the ceramics incubated in TRIS compared to the untreated ceramics. In addition, an increase in protein concentration in solution was determined for ADA gelatin-loaded ceramics. The macroporous Curasan ceramic exhibited a maximum failure load of 29 ± 9.0 N, whereas the value for the microporous RMS ceramic was 931 ± 223 N. Filling the RMS ceramic with ADA gelatin increased the maximum failure load to 1114 ± 300 N. The Curasan ceramics were too fragile for loading. The maximum failure load decreased for the RMS ceramics to 686.55 ± 170 N by incubation in TRIS pH 7.4 and 651 ± 287 N at pH 5.0.

Dynamic and Quasi-Static Compressive Deformation Behaviour of Polyimide Foam at Various Elevated Temperature

2014 ◽  
Vol 566 ◽  
pp. 158-163 ◽  
Author(s):  
A. Yosimoto ◽  
Hidetoshi Kobayashi ◽  
Keitaro Horikawa ◽  
Keiko Watanabe ◽  
Kinya Ogawa
Keyword(s):  
Compressive Strength ◽  
Room Temperature ◽  
Deformation Behaviour ◽  
Testing Machine ◽  
Negative Temperature ◽  
Strain Rates ◽  
Compression Tests ◽  
Hopkinson Pressure Bar ◽  
Universal Testing ◽  
Pressure Bar

In order to clarify the effect of strain rate and test temperature on the compressive strength and energy absorption of polyimide foam, a series of compression tests for the polyimide foam with two different densities were carried out. By using three testing devices, i.e. universal testing machine, dropping weight machine and sprit Hopkinson pressure bar apparatus, we performed a series of compression tests at various strain rates (10-3~103s-1) and at several test temperatures in the range of room temperature to 280 ̊C. At over 100 s-1, the remarkable increase of flow stress was observed. The negative temperature dependence of strength was also observed.

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