The effect of TiO2 and SiO2 nanoparticles on flexural strength of poly (methyl methacrylate) acrylic resins

Ahmad, Shahzad; Bahador, Abbas; Khalil, Safia; Shahroudi, Atefe Saffar; Kassaee, M.Z.

doi:10.1016/j.jpor.2012.05.001

Cited by 168 publications

(165 citation statements)

References 34 publications

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“…Other possible causative factors for the decrease in strength could be a reduction in the cross section of the PMMA matrix; an increase in the amount of filler particles which increases the stress concentration. Similar results were also found in researches on reinforcing PMMA with nanotube 12) or nanofiber 29) . The addition of 0.5% multiwalled carbon nanotubes (MWCNTs) increased the flexural strength of PMMA by an average of 9.3, but 2% addition of MWCNTs resulted in a 11.4% decrease in flexural strength due to the poor dispersion of MWCNTs 27) .…”

Section: Discussionsupporting

confidence: 89%

“…The addition of 0.5% multiwalled carbon nanotubes (MWCNTs) increased the flexural strength of PMMA by an average of 9.3, but 2% addition of MWCNTs resulted in a 11.4% decrease in flexural strength due to the poor dispersion of MWCNTs 27) . Compared with researches of the similar kind [11][12][13][14][15] , the 13.5% increase in flexural strength of PMMA by addition of PI in this study could be satisfying.…”

Section: Discussionmentioning

confidence: 44%

“…In recent years, nanoparticles and nanofibers have been considered as new potential filler for strengthening dental composites due to the large surface area and good stress transferring features 10) . Many investigations have focused on nanoparticle addition to strengthen PMMA, such as addition of nanosilica 11) , carbon nanotube 12) or TiO2 and SiO2 nanoparticles 13) , and some of them have shown progress. But on the other hand, decreased mechanical properties of PMMA resulted from nanoparticle addition have also been reported 14,15) .…”

Section: Introductionmentioning

confidence: 99%

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Effect of polyimide addition on mechanical properties of PMMA-based denture material

Yang

Zhao

et al. 2017

Dental Materials Journal

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The aim of the study was to evaluate the effect of modifying polymethyl methacrylate (PMMA) denture base material with polyimide (PI) on its flexural property and biocompatibility. Low molecular weight (1,500 g/mol) PI was synthesized and small amount of PI (0.4, 0.6, 0.8 and 1 wt%) was dispersed into the PMMA matrix. Three-point bending tests, scanning electron microscopy and thermal cycling were used to measure the mechanical properties, while MTT assay was used to evaluate the biocompatibility of the denture base material. The results showed that 0.6% addition of PI significantly increased flexural strength of PMMA denture base material by 13.5%, compared with the control group (p<0.05). Even after 5,000 hydrothermal cycling the reinforce effect still existed. However, when the PI content further increased, flexural strength of the denture base material decreased due to particle agglomeration. The MTT assay confirmed that the addition of PI did not change the biocompatibility of the PMMA denture base material. The present study suggested that blending polyimide in the proper proportion can be a potential method to strengthen the PMMA-based denture base material.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 44%

Section: Introductionmentioning

confidence: 99%

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Effect of polyimide addition on mechanical properties of PMMA-based denture material

Yang

Zhao

et al. 2017

Dental Materials Journal

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“…6,7 It was found that the physical properties of acrylic resins are influenced by the addition of nanoparticles as the reinforcing agent. 8,9 Previous studies and the international standards for denture bases found that PMMA-containing nanoparticles outperform conventional PMMA. 10,11 Recently, studies have investigated the effect of incorporating inorganic nanoparticles into PMMA to improve its properties.…”

mentioning

confidence: 99%

“…13 Many reports proved the dependence of acrylic resin properties on nanoparticle concentrations. 8,9,15,16 Nanomaterials are known for their superior characteristics compared to the conventional ones. 13,14 When these nanomaterials are incorporated into a polymer matrix as fillers, propitious features of both constituents integrate to improve the optical and mechanical properties of nanocomposites.…”

mentioning

confidence: 99%

Effect of zirconium oxide nanoparticles addition on the optical and tensile properties of polymethyl methacrylate denture base material

Gad¹,

Abualsaud²,

Rahoma

et al. 2018

IJN

116

119

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Background Polymethyl methacrylate (PMMA) is widely used for the fabrication of removable prostheses. Recently, zirconium oxide nanoparticles (nano-ZrO 2 ) have been added to improve some properties of PMMA, but their effect on the optical properties and tensile strength are neglected. Objective The aim of this study was to investigate the effect of nano-ZrO 2 addition on the translucency and tensile strength of the PMMA denture base material. Materials and methods Eighty specimens (40 dumbbell-shaped and 40 discs) were prepared out of heat-polymerized acrylic resin and divided into four groups per test (n=10). The control group for each test included unreinforced acrylic, while the test groups were reinforced with 2.5, 5, and 7.5 wt% nano-ZrO 2 . Acrylic resin was mixed according to manufacturer’s instructions, packed, and processed by conventional method. After polymerization, all specimens were finished, polished, and stored in distilled water at 37°C for 48±2 hours. Tensile strength (MPa) was evaluated using the universal testing machine while the specimens’ translucency was examined using a spectrophotometer. Statistical analysis was carried out by SPSS using the paired sample t -test ( p ≤0.05). A scanning electron microscope was used to analyze the morphological changes and topography of the fractured surfaces. Results This study showed that the mean tensile strength of the PMMA in the test groups of 2.5%NZ, 5%NZ, and 7.5%NZ was significantly higher than the control group. The tensile strength increased significantly after nano-ZrO 2 addition, and the maximum increase seen was in the 7.5%NZ group. The translucency values of the experimental groups were significantly lower than those of the control group. Within the reinforced groups, the 2.5%NZ group had significantly higher translucency values when compared to the 5%NZ and 7.5%NZ groups. Conclusion The addition of nano-ZrO 2 increased the tensile strength of the denture base acrylic. The increase was directly proportional to the nano-ZrO 2 concentration. The translucency of the PMMA was reduced as the nano-ZrO 2 increased. Clinical significance Based on the results of the current study, the tensile strength was improved with different percentages of nano-ZrO 2 additions. However, translucency was adversely affected. Therefore, it is important to determine the appropriate amount of reinforcing nano-ZrO 2 that will create a balance between achieved properties – mechanical and optical.

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Learning from Nature: Fighting Pathogenic Escherichia coli Bacteria Using Nanoplasmonic Metasurfaces

Smith

Mazloumi

Karperien

et al. 2023

Adv Materials Inter

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Bioinspired nanoplasmonic 3D crossed surface relief gratings and metasurfaces are fabricated on azobenzene molecular glass thin films to create effective antibacterial surfaces. A synergetic mechanical and photothermal interaction at the interface between the nanostructures and the Escherichia coli (E. coli) bacteria results in a significant decrease in the viable bacterial population. In particular, combined exposure to the interfacial nanospikes as well as the evanescent blue and red electromagnetic fields induced by the nanoplasmonic metasurface, results in a 97% reduction of the viable E. coli in only 25 min, when illuminated with a low-power white light. IntroductionAntibiotics can be regarded as a lifesaving marvel for humanity since the discovery of penicillin in 1928. However, overuse of antibiotics around the world has resulted in bacterial resistance, leading to an estimated 700 000 deaths per year which could increase to ≈10 million deaths annually by 2050 with a potential cost of up to 100 trillion USD. [1] To combat this important problem and to reduce antibiotic use, scientists are exploring alternative options. One way is to learn from nature.Many natural examples, such as lotus leaves, [2] shark skin, [3] cicada wings, [4] and flower petals [5] have been shown to possess antibacterial and self-cleaning surfaces. Researchers have tried to learn from nature and replicate these natural surface structures to affect pathogens through physical and chemical interactions. [6] One method is to create bioinspired antibacterial

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The effect of TiO2 and SiO2 nanoparticles on flexural strength of poly (methyl methacrylate) acrylic resins

Abstract: Incorporation of TiO(2) and SiO(2) nanoparticles into acrylic resins can adversely affect the flexural strength of the final products, and this effect is directly correlated with the concentration of nanoparticles.

Cited by 168 publications

References 34 publications

Effect of polyimide addition on mechanical properties of PMMA-based denture material

Effect of polyimide addition on mechanical properties of PMMA-based denture material

Effect of zirconium oxide nanoparticles addition on the optical and tensile properties of polymethyl methacrylate denture base material

Learning from Nature: Fighting Pathogenic Escherichia coli Bacteria Using Nanoplasmonic Metasurfaces

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