Effect of Filler Ratio on Properties of Nanohydroxyapatite/SiO2 Based Bioactive Dental Resin Composites

Hydroxyapatite (HAP), as an essential component of bone and tooth, is one of the promising bioactive materials. The purpose of this study was to investigate the effects of incorporation of nanoHAP and SiO2 particles on the properties of bioactive dental composite. Silanized HAP and SiO2 were mixed with BisGMA/TEGDMA (1/1 wt/wt) monomers at various HAP/SiO2 mass ratios of 0:7 (no HAP), 5.25/1.75, 3.5/3.5, 1.75/5.25, 7:0 (no SiO2) to yield a series of pastes all containing 70 wt% filler loading. The results showed that flexural strength, elastic modulus and compressive strength gradually decreased with increasing amount of HAP particles, as well as curing depth and polymerization shrinkage, which resulted from the nature of HAP particle material. Water sorption and solubility in water increased slightly with addition of HAP particles. Degree of conversion test could support results above well. Remineralization test in SBF demonstrated dental composite with HAP particles had a good apatite-forming ability. Consequently, dental composite filled with lower amount of nanoHAP (HAP/SiO2 around 0.25) particles would possess better comprehensive performances.

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Simulated Body Fluid Sorption and Solubility of Silica Reinforced Dental Resin Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.795.626 ◽

2013 ◽

Vol 795 ◽

pp. 626-630 ◽

Cited By ~ 1

Author(s):

Saad Omar Alsharif ◽

Md Akil Hazizan ◽

Nasser Abbas Abd El-Aziz ◽

Zainal Arifin Ahmad

Keyword(s):

Simulated Body Fluid ◽

Body Fluid ◽

Resin Composite ◽

Triethylene Glycol ◽

Filler Loading ◽

Resin Matrix ◽

Resin Composites ◽

Dental Resin ◽

Triethylene Glycol Dimethacrylate ◽

Dental Resin Composites

The aim of this study is to investigate the effect of filler loading on the sorption and solubility of Simulated Body Fluid (SBF) of self-prepared micro dental resin composites. The prepared resin composite was based on silica (SiO2) particles and bisphenol-a-glycidyl methacrylate (Bis-GMA) as a base monomer and triethylene glycol dimethacrylate (TEGDMA) as a co-monomer. The filler was mixed with monomers, in proportions of 40, 50 and 60 wt.%. A resin matrix containing 0 wt.% filler was used as the control composition to evaluate the effect of filler loading on the sorption and solubility of SBF. The experimental methods were based on the procedure mentioned in the ISO 4049 (2009) standard for dentistry-Polymer-based restorative Materials. The sorption and solubility of resin matrix/SiO2composite decreased gradually as the filler loading increased. The increase of filler loading showed significant differences in the sorption and solubility as tested by ANOVA (P= 0.000).

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Influence of Silica and Zirconia Particles as Filler Loading on the Radiopacity of Dental Resin Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.620.345 ◽

2012 ◽

Vol 620 ◽

pp. 345-349 ◽

Cited By ~ 2

Author(s):

Saad Omar Alsharif ◽

Md Akil Hazizan ◽

Nasser Abbas Abd El-Aziz ◽

Zainal Arifin Ahmad

Keyword(s):

Glycidyl Methacrylate ◽

Triethylene Glycol ◽

Filler Loading ◽

Aluminum Plate ◽

Resin Matrix ◽

Resin Composites ◽

Dental Resin ◽

Triethylene Glycol Dimethacrylate ◽

Dental Resin Composites ◽

Base Resin

The aim of this study is to evaluate the radiopacity of silica (SiO2) and zirconia (ZrO2) particles dispersed in a bisphenol-a-glycidyl methacrylate (Bis-GMA) as a base resin and triethylene glycol dimethacrylate (TEGDMA) as a diluent. The fillers were mixed separately with bis-GMA/TEGDMA monomers, in proportions of 40, 50 and 60 wt.%. A resin matrix containing 0 wt.% filler was used as the control composition to evaluate the effect of filler loading on the radiopacity. Samples of the composites with 2.5 mm thickness were compared their radiopacity with the same thickness of the standard aluminum plate. The radiopacity of both resin matrix/SiO2and resin matrix/ZrO2composites increased gradually as the filler loading increased. The resin matrix/ZrO2composites possessed radiopacity higher than the standard aluminum plate. The increase of filler loading showed highly significant differences in the radiopacity as tested by ANOVA (P= 0.000).

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Effect of Speed of Loading on Compressive Strength and Flexural Strength of Dental Resin-Composites

Egyptian Dental Journal ◽

10.21608/edj.2018.78070 ◽

2018 ◽

Vol 64 (1) ◽

pp. 625-633

Author(s):

Samy El-Safty

Keyword(s):

Compressive Strength ◽

Flexural Strength ◽

Resin Composites ◽

Dental Resin ◽

Dental Resin Composites

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Influence of Al2O3 as Filler Loading on the Fracture Toughness of Light-Cured Dental Resin Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.816-817.227 ◽

2013 ◽

Vol 816-817 ◽

pp. 227-231 ◽

Cited By ~ 3

Author(s):

Saad Omar Alsharif ◽

Hazizan Md Akil ◽

Nasser Abbas Abd El-Aziz ◽

Zainal Arifin Bin Ahmad

Keyword(s):

Fracture Toughness ◽

Filler Loading ◽

Bending Test ◽

Resin Composites ◽

Dental Resin ◽

Notched Specimen ◽

Three Point Bending ◽

Dental Resin Composites ◽

Significant Difference ◽

Composite Samples

The purpose of the present study was to evaluate the effect of filler loading on the fracture toughness of light-cured dental resin composites (DRCs). The monomer Bis-GMA and TEGDMA (75/25 wt/wt) were mixed with treated micro-sized aluminum oxide (Al2O3) particles ranging from 40-60 wt% as filler. The composite samples were cured with LED for 80s. The bulk density (g/cm3) and apparent porosity (%) of the samples were determined according to the ASTM standard. The fracture toughness (KIC) values of the composites were determined using a single edge notched specimen in the three-point bending test. There was a significant difference in KICof the composites with different loading of Al2O3particles (p< 0.05). The highest amount of filler (60 wt%) reduced the KICvalue to 1.5 MPa.m1/2. As a conclusion, the Al2O3particles used as filler loading does have an effect on the mechanical properties of DRCs.

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A new method for predicting the maximum filler loading of dental resin composites based on DEM simulations and experiments

Dental Materials ◽

10.1016/j.dental.2020.09.005 ◽

2020 ◽

Vol 36 (12) ◽

pp. e375-e385

Author(s):

Hao Niu ◽

Dan-Lei Yang ◽

Qian Sun ◽

Yuan Pu ◽

Tianyu Gao ◽

...

Keyword(s):

Filler Loading ◽

New Method ◽

Resin Composites ◽

Dental Resin ◽

Dem Simulations ◽

Dental Resin Composites

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Study of POSS on the Properties of Novel Inorganic Dental Composite Resin

Polymers ◽

10.3390/polym12020478 ◽

2020 ◽

Vol 12 (2) ◽

pp. 478 ◽

Cited By ~ 6

Author(s):

Jiahui Wang ◽

Yizhi Liu ◽

Jianxin Yu ◽

Yi Sun ◽

Weili Xie

Keyword(s):

Mechanical Properties ◽

Composite Resin ◽

Dental Composite ◽

Resin Composites ◽

Dental Resin ◽

Dental Resin Composites ◽

Dental Composite Resin ◽

Light Curing ◽

Curing Method ◽

Oligomeric Silsesquioxane

Various amounts of methacryl polyhedral oligomeric silsesquioxane (POSS) were explored to be incorporated into novel nano SiO2 dental resin composites using light curing method. The scanning electron microscopy (SEM), optical microscopy, fourier transform infrared spectroscopy (FTIR), nanoindentation, nanoscratch and three-point flexure tests were performed. The volumetric shrinkage and mechanical properties such as hardness, elastic modulus, resistance, flexural strength and fracture energy were analyzed. With the additions of POSS, the volume shrinkage decreased and the mechanical properties initially increased. The effects of POSS on these properties were studied to provide a reference for clinically selecting a composite resin with excellent properties.

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Examining the Effect of Radiant Exposure on Commercial Photopolimerizable Dental Resin Composites

Dentistry Journal ◽

10.3390/dj6040055 ◽

2018 ◽

Vol 6 (4) ◽

pp. 55 ◽

Cited By ~ 2

Author(s):

Carlos Cuevas-Suárez ◽

Belinda Pimentel-García ◽

Alejandro Rivera-Gonzaga ◽

Carlos Álvarez-Gayosso ◽

Adriana Ancona-Meza ◽

...

Keyword(s):

Elastic Modulus ◽

Water Sorption ◽

Water Solubility ◽

Light Exposure ◽

Physical And Mechanical Properties ◽

Degree Of Conversion ◽

Resin Composites ◽

Dental Resin ◽

Radiant Exposure ◽

Dental Resin Composites

The objective of this study was to evaluate the effect of radiant exposure on the chemical and physical properties of four commercial dental resin composites. The four dental resin composites used were Kalore, Admira, Tetric N-Ceram Bulk Fill, and Filtek Z350 XT. The composites were subjected to three curing protocols: 1000 mW/cm2 for 5 s, 1000 mW/cm2 for 10 s, and 400 mW/cm2 for 25 s. The flexural strength, elastic modulus, water sorption, water solubility, degree of conversion, and polymerization shrinkage were evaluated. The results were analyzed by means of ANOVA and Tukey tests. For Admira and Kalore, significant differences between light exposure protocols were observed for the elastic modulus (p < 0.001), which was higher when a higher amount of radiant exposure was used. For Filtek Z350, differences were only observed for the degree of conversion (p < 0.001), and a higher amount of radiant exposure allowed us to obtain higher values. The Tetric N-Ceram Bulk Fill analysis showed significant differences for the elastic modulus and water sorption (p < 0.001), and specimens that had been subject to a radiant exposure of 10 J/cm2 showed a higher elastic modulus. In most cases, the physical and mechanical properties analyzed were not affected by different radiant exposure values. Other resin-based composite (RBC) characteristics seem to have a greater influence on material properties.

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