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

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

Materials Science Forum ◽

10.4028/www.scientific.net/msf.745-746.466 ◽

2013 ◽

Vol 745-746 ◽

pp. 466-472 ◽

Cited By ~ 3

Author(s):

Feng Wei Liu ◽

Jing Hang Hu ◽

Rui Li Wang ◽

Ying Ying Pan ◽

Xiao Ze Jiang ◽

...

Keyword(s):

Compressive Strength ◽

Water Sorption ◽

Filler Loading ◽

Dental Composite ◽

Lower Amount ◽

Resin Composites ◽

Dental Resin ◽

Bioactive Materials ◽

Solubility In Water ◽

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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Effect of light intensity and water aging on surface hardness of dental resin-composites

Revue Roumaine de Chimie ◽

10.33224/rrch/2019.64.11.10 ◽

2019 ◽

Vol 64 (11) ◽

pp. 1007-1014

Author(s):

Tong XU ◽

◽

Jia-Hui ZHANG ◽

Zhao-Ying LIU ◽

Xuan LI ◽

...

Keyword(s):

Light Intensity ◽

Surface Hardness ◽

Resin Composites ◽

Dental Resin ◽

Dental Resin Composites ◽

Effect Of Light

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Surface Roughness and Hardness of Dental Resin-Composites Intended for Bulk-fill Placement

Egyptian Dental Journal ◽

10.21608/edj.2018.77232 ◽

2018 ◽

Vol 64 (3) ◽

pp. 2491-2499

Author(s):

Samy El-safty ◽

Usama Abdel Karim

Keyword(s):

Surface Roughness ◽

Resin Composites ◽

Dental Resin ◽

Dental Resin Composites

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Viscosity and stickiness of dental resin composites at elevated temperatures

Dental Materials ◽

10.1016/j.dental.2020.11.024 ◽

2021 ◽

Vol 37 (3) ◽

pp. 413-422

Author(s):

Nikolaos Loumprinis ◽

Eva Maier ◽

Renan Belli ◽

Anselm Petschelt ◽

George Eliades ◽

...

Keyword(s):

Elevated Temperatures ◽

Resin Composites ◽

Dental Resin ◽

Dental Resin Composites

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Effect of Accelerated Aging on Some Mechanical Properties and Wear of Different Commercial Dental Resin Composites

Materials ◽

10.3390/ma14112769 ◽

2021 ◽

Vol 14 (11) ◽

pp. 2769

Author(s):

Jonne Oja ◽

Lippo Lassila ◽

Pekka K. Vallittu ◽

Sufyan Garoushi

Keyword(s):

Mechanical Properties ◽

Flexural Strength ◽

Accelerated Aging ◽

Wear Depth ◽

Resin Composites ◽

Expiration Date ◽

Dental Resin ◽

Hydrothermal Aging ◽

Dental Resin Composites

The aim of current in vitro research was to determine the effect of hydrothermal accelerated aging on the mechanical properties and wear of different commercial dental resin composites (RCs). In addition, the effect of expiration date of the composite prior its use was also evaluated. Five commercially available RCs were studied: Conventional RCs (Filtek Supreme XTE, G-aenial Posterior, Denfil, and >3y expired Supreme XTE), bulk-fill RC (Filtek Bulk Fill), and short fiber-reinforced RC (everX Posterior). Three-point flexural test was used for determination of ultimate flexural strength (n = 8). A vickers indenter was used for testing surface microhardness. A wear test was conducted with 15,000 chewing cycles using a dual-axis chewing simulator. Wear pattern was analyzed by a three-dimensional (3D) noncontact optical profilometer. Degree of C=C bond conversion of monomers was determined by FTIR-spectrometry. The specimens were either dry stored for 48 h (37 °C) or boiled (100 °C) for 16 h before testing. Scanning electron microscopy (SEM) was used to evaluate the microstructure of each material. Data were analyzed using ANOVA (p = 0.05). Hydrothermal aging had no significant effects on the surface wear and microhardness of tested RCs (p > 0.05). While flexural strength significantly decreased after aging (p < 0.05), except for G-aenial Posterior, which showed no differences. The lowest average wear depth was found for Filtek Bulk Fill (29 µm) (p < 0.05), while everX Posterior and Denfil showed the highest wear depth values (40, 39 µm) in both conditions. Passing the expiration date for 40 months did not affect the flexural strength and wear of tested RC. SEM demonstrated a significant number of small pits on Denfil’s surface after aging. It was concluded that the effect of accelerated aging may have caused certain weakening of the RC of some brands, whereas no effect was found with one brand of RC. Thus, the accelerated aging appeared to be more dependent on material and tested material property.

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