scholarly journals Effect of amylase activity on mechanical properties of dental composite resin

2020 ◽  
Author(s):  
Guang HONG ◽  
Zhen CHEN ◽  
Jian-min HAN ◽  
Wei-qi WANG ◽  
Ping GAO ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Resin ◽  
Amylase Activity ◽  
Dental Composite ◽  
Dental Composite Resin

scholarly journals Improving mechanical properties of flowable dental composite resin by adding silica nanoparticles

2013 ◽  
Vol 70 (5) ◽  
pp. 477-483 ◽  
Author(s):  
Sebastian Balos ◽  
Branka Pilic ◽  
Branislava Petronijevic ◽  
Dubravka Markovic ◽  
Sinisa Mirkovic ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Resin ◽  
Flexural Modulus ◽  
Control Sample ◽  
Sem Analysis ◽  
Dental Composite ◽  
Scanning Calorimetry ◽  
Low Viscosity ◽  
Dental Composite Resin ◽  
The Difference

Background/Aim. The main drawback of flowable dental composite resin is low strength compared to conventional composite resin, due to a low amount of filler, neccessary for achieving low viscosity and ease of handling. The aim of this study was to improve mechanical properties of flowable dental composite resin by adding small amount of nanoparticles, which would not compromise handling properties. Methods. A commercially available flowable dental composite resin material was mixed with 7 nm aftertreated hydrophobic fumed silica and cured by an UV lamp. Four sets of samples were made: control sample (unmodified), the sample containing 0.05%, 0.2% and 1% nanosilica. Flexural modulus, flexural strength and microhardness were tested. One-way ANOVA followed by Tukey?s test with the significance value of p < 0.05 was performed to statistically analyze the obtained results. Furthermore, differential scanning calorimetry (DSC) and SEM analysis were performed. To asses handling properties, slumping resistance was determined. Results. It was found that 0.05% is the most effective nanosilica content. All the tested mechanical properties were improved by a significant margin. On the other hand, when 0.2% and 1% nanosilica content was tested, different results were obtained, some of the mechanical properties even dropped, while some were insignificantly improved. The difference between slumping resistance of unmodified and modified samples was found to be statistically insignificant. Conclusions. Low nanosilica addition proved more effective in improving mechanical properties compared to higher additions. Furthermore, handling properties are unaffected by nanosilica addition.

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

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 478 ◽  
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.

Effect of layered double hydroxide intercalated with fluoride ions on the physical, biological and release properties of a dental composite resin

2014 ◽  
Vol 42 (1) ◽  
pp. 60-67 ◽  
Author(s):  
Loredana Tammaro ◽  
Vittoria Vittoria ◽  
Anna Calarco ◽  
Orsolina Petillo ◽  
Francesco Riccitiello ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
Composite Resin ◽  
Dental Composite ◽  
Fluoride Ions ◽  
Dental Composite Resin ◽  
Double Hydroxide

scholarly journals Effect of light intensity and irradiation time on the polymerization process of a dental composite resin

2004 ◽  
Vol 7 (2) ◽  
pp. 313-318 ◽  
Author(s):  
José Augusto César Discacciati ◽  
Alisson Discacciati Neves ◽  
Rodrigo Lambert Oréfice ◽  
Flávio Juliano Garcia Santos Pimenta ◽  
Herbert Haueisen Sander
Keyword(s):  
Light Intensity ◽  
Composite Resin ◽  
Irradiation Time ◽  
Dental Composite ◽  
Polymerization Process ◽  
Dental Composite Resin ◽  
Effect Of Light
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