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

Baloš, Sebastian; Pilić, Branka; Petronijevic, Branislava; Marković, Dubravka; Mirković, Siniša; Sarcev, Ivan

doi:10.2298/vsp1305477b

Cited by 31 publications

(20 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…of alumina nanofillers showed the highest value of flexural strength. Table (5) showed statistically nonsignificant differences in mean flexural strength between Zirconia filler and Alumina filler at (2% and 8%) concentrations, but Zirconia filler at 4% concentration had a statistically significant elevation in mean flexural strength compared to Alumina filler (P<0.039).…”

Section: ιV-flexural Strengthmentioning

confidence: 91%

“…As flowable composites exhibit a relatively low mechanical properties due to low filler content, one notable way of improving it is adding nanoparticles. The addition of nanoparticles might improve its strength, abrasion resistance, decrease the polymerization shrinkage as there is a correlation between physical and mechanical properties and filler content weight and size in composite resins (5) .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Zirconia and Alumina Nanofillers on the Microstructure and Some Properties of Flowable Composite

Hafez

Masoud²,

Tayeb

2019

ADJ-for Girls

View full text Add to dashboard Cite

PURPOSE:This study was conducted to evaluate the effect of reinforcing flowable composite with different concentrations of zirconia and alumina nanofillers on its microstructure, complex viscosity, colour changes, flexural strength and degree οf cοnversiοn. MATERIALS AND METHODS: 200 samples were divided according to nanofillers type into two groups (n=100), each group was subdivided into five subgroups according to concentration of fillers (0%, 2%,4%,8%and16%)(n=20). Each subgroup was subdivided into 4 subdivisions according to type of test performed (n=5).Samples were characterized by SEM, viscosity was measured by oscillatory rheοmeter, colour changes was measured using spectrophotometer, flexural strength was measured by three point bending test and degree of conversion was measured by FTΙR. RESULTS:SEM showed homogenous distribution of zircοnia and alumina np at 2&4wt%, some agglomeration for both types of fillers at 8wt%. For complex viscosity, zirconia np at 16wt%at 25℃ had higher median value compared to 37℃(6.17),Alumina np at 2wt% and 4wt% at 25℃ had higher median value compared to 37℃(5.665),(8.516) respectively. For colour changes, zr& al np at 4wt% showed the highest mean values (10.2±1.5,11.1±1.4)respectively. Ιn flexural strength, zirconia filler at 4wt% had higher mean value(137.8±18.1MPa)compared to alumina filler(94.4±16.9MPa). For DC,4wt% for both zr& al np showed the highest mean values compared to other groups(66.4±2.4,64.3±0.82) respectively. CONCLUSION: Viscosity increased as the concentration of nanofillers increased. Ιncorporation of nanofillers affected the cοlour of the flowable composite. Flexural strength was improved with increasing the concentration of zirconia nanofillers, while it decreased with alumina nanofillers. DC increased as the filler concentration increased till 4 wt.% then decreased.

show abstract

Section: ιV-flexural Strengthmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Effect of Zirconia and Alumina Nanofillers on the Microstructure and Some Properties of Flowable Composite

Hafez

Masoud²,

Tayeb

2019

ADJ-for Girls

View full text Add to dashboard Cite

show abstract

“…Obviously, the particle type, size, content, surface properties and distribution all influence the composite mechanical properties. An approach used in works by Balos et al 19,20 comprised of the addition of relatively low (under 2%) of hydrophobic SiO 2 particles to improve the mechanical properties (microhardness, flexural strength, flexural modulus and fracture toughness) of flow dental composites, as well as PMMA denture bases. Low SiO 2 particle addition of 0.05% proved to be beneficial for all tested mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Flexural strength and modulus of autopolimerized poly (methyl methacrylate) with nanosilica

et al. 2018

Self Cite

View full text Add to dashboard Cite

Background/Aim. Autopolymerized, or cold polymerized poly(methyl methacrylate) class of materials have a lower mechanical properties compared to hot polymerized poly(methyl methacrylate), due to a limited time of mixing before the polymerization process begins. The aim of this study was to test the effect of different relatively low nanosilica contents, in improving mechanical properties of the cold polymerized poly(methyl methacrylate). Methods. A commercially available autopolymerized poly(methyl methacrylate) denture reline resin methyl methacrylate liquid component was mixed with 7 nm after treated hydrophobic fumed silica and subsequently mixed with poly(methyl methacrylate) powder. Three nanosilica loadings were used: 0.05%, 0.2% and 1.5%. Flexural modulus and strength were tested, with one way ANOVA followed by Tukey's test. Furthermore, zeta potential, differential scanning calorimetry, scaning electrone microscopy and energy dispersive X-ray analyses were performed. Results. Flexural modulus and strength of poly(methyl methacrylate) based nanocomposites were statistically significantly increased by the addition of 0.05% nano-SiO2. The increase in nanosilica content up to 1.5% does not contribute to mechanical properties tested, but quite contrary. The main reason was agglomeration, that occurred before mixing of the liquid and powder component and was proved by zeta potential measurement, and after mixing, proved by scanning electrone microscopy and energy dispersive x-ray analyses. Conclusions. Addition of 7 nm 0.05% SiO2 is the most effective in increasing flexural modulus and strength of autopolimerized poly(methyl methacrylate).

show abstract

“…Applications of nano-sized fillings in the resin matrices have overcome some of the mechanical limitations and have significantly improved their clinical performance. Commonly used nanomaterials include nano-ZnO, 3,4 nano-silica, 18,19 nano-calcium phosphate and calcium fluoride (nano-Ca 3 (PO 4 ) 2 and CaF 2 , respectively), 20 and nano-TiO 2 . 21 In addition to composite resins, the utilization of nanomaterials in dental adhesives has also effectively improved their bonding strengths and mechanical properties.…”

Section: Composite Resins and Bonding Systemsmentioning

confidence: 99%

Application of dental nanomaterials: potential toxicity to the central nervous system

Feng¹,

Chen²,

Wang³

et al. 2015

IJN

View full text Add to dashboard Cite

Nanomaterials are defined as materials with one or more external dimensions with a size of 1–100 nm. Such materials possess typical nanostructure-dependent properties (eg, chemical, biological, optical, mechanical, and magnetic), which may differ greatly from the properties of their bulk counterparts. In recent years, nanomaterials have been widely used in the production of dental materials, particularly in light polymerization composite resins and bonding systems, coating materials for dental implants, bioceramics, endodontic sealers, and mouthwashes. However, the dental applications of nanomaterials yield not only a significant improvement in clinical treatments but also growing concerns regarding their biosecurity. The brain is well protected by the blood–brain barrier (BBB), which separates the blood from the cerebral parenchyma. However, in recent years, many studies have found that nanoparticles (NPs), including nanocarriers, can transport through the BBB and locate in the central nervous system (CNS). Because the CNS may be a potential target organ of the nanomaterials, it is essential to determine the neurotoxic effects of NPs. In this review, possible dental nanomaterials and their pathways into the CNS are discussed, as well as related neurotoxicity effects underlying the in vitro and in vivo studies. Finally, we analyze the limitations of the current testing methods on the toxicological effects of nanomaterials. This review contributes to a better understanding of the nano-related risks to the CNS as well as the further development of safety assessment systems.

show abstract

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

Abstract: Low nanosilica addition proved more effective in improving mechanical properties compared to higher additions. Furthermore, handling properties are unaffected by nanosilica addition.

Cited by 31 publications

References 9 publications

Effect of Zirconia and Alumina Nanofillers on the Microstructure and Some Properties of Flowable Composite

Effect of Zirconia and Alumina Nanofillers on the Microstructure and Some Properties of Flowable Composite

Flexural strength and modulus of autopolimerized poly (methyl methacrylate) with nanosilica

Application of dental nanomaterials: potential toxicity to the central nervous system

Contact Info

Product

Resources

About