The Effect of Silica and Prepolymer Nanoparticles on the Mechanical Properties of Denture Base Acrylic Resin

Çevik, Pınar; Yildirim-Biçer, Arzu Zeynep

doi:10.1111/jopr.12573

Cited by 58 publications

(83 citation statements)

References 38 publications

(76 reference statements)

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“…The size of nano-SiO 2 being <100 nm enabled them to penetrate between linear macromolecule chains restricting their movement. 38,39 Based on the results of this study, the addition of nano-SiO 2 to repair resin significantly improved the impact strength of repaired resin. The increase in impact strength with low SiO 2 concentration may be due to interfacial shear strength between nanoparticles and resin matrix owing to cross-linking or supra molecular bonding which prevents crack propagation.…”

Section: Discussionmentioning

confidence: 70%

“…The increase in flexural strength with low nano‐SiO 2 concentration may be attributed to the homogenous distribution of nanoparticles and their ability to fill inter‐polymeric chain spaces. The size of nano‐SiO 2 being <100 nm enabled them to penetrate between linear macromolecule chains restricting their movement . Based on the results of this study, the addition of nano‐SiO 2 to repair resin significantly improved the impact strength of repaired resin.…”

Section: Discussionmentioning

confidence: 76%

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Comparative Effect of Glass Fiber and Nano‐Filler Addition on Denture Repair Strength

Abushowmi

AlZaher

Almaskin

et al. 2019

Journal of Prosthodontics

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Purpose To evaluate and compare the effects of glass fiber (GF), Zirconium oxide nanoparticles (nano‐ZrO2), and silicon dioxide nanoparticles (nano‐SiO2) addition on the flexural strength and impact strength of repaired denture base material. Materials and Methods Heat‐polymerized acrylic resin specimens were fabricated. All specimens were sectioned centrally and beveled creating 2.5 mm repair gap except for 10 controls. Specimen grouping (n = 10/group) was done according to filler concentration of 0%, 0.25%, 0.5%, and 0.75% of auto‐polymerized acrylic powder. Modified resin was mixed, packed in the repair gap, polymerized, finished and polished. Three‐point bending test and Charpy type impact testing were done. Data were analyzed using one‐way‐ANOVA and Post‐Hoc Tukey test (α = 0.05). Results All additives significantly increased flexural strength and impact strength (p < 0.05). Within the modified subgroups, no significant differences were found for GF. Significant increase for nano‐ZrO2 and significant decrease for nano‐SiO2 as the concentration of additive increased were noted for both flexural strength and impact strength. Highest flexural strength was found with 0.75%‐nano‐ZrO2 (69.59 ± 2.52MPa) and the lowest was found with 0.75%‐nano‐SiO2 (53.82 ± 3.10MPa). The 0.25%‐nano‐SiO2 showed the highest impact strength value (2.54 ± 0.21 kJ/m2) while the lowest impact strength value was seen with 0.75%‐nano‐SiO2 (1.54 ± 0.17 kJ/m2). Conclusion Nano‐filler effect was concentration dependent and its addition to repair resin increased the flexural and impact strengths. The incorporation of 0.75%‐ZrO2 or 0.25%‐SiO2 into repair resin proved to be a promising technique to enhance repair strength and avoid repeated fractures.

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Section: Discussionmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 76%

Comparative Effect of Glass Fiber and Nano‐Filler Addition on Denture Repair Strength

Abushowmi

AlZaher

Almaskin

et al. 2019

Journal of Prosthodontics

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“…87 On the other hand, a recent study found that silica NPs adversely affect the flexural strength of PMMA. 88 Silica-based filler Reinforcement of acrylic resin with glass flakes enhanced its fracture toughness, and the use of silane coupling resulted in further improvement of the resin's properties. 40 Micas are a group of lamellar silicate minerals, which have been suggested to improve resin's properties.…”

Section: Mineralsmentioning

confidence: 99%

PMMA denture base material enhancement: a review of fiber, filler, and nanofiller addition

Gad

Fouda

Al‐Harbi

et al. 2017

IJN

269

283

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This paper reviews acrylic denture base resin enhancement during the past few decades. Specific attention is given to the effect of fiber, filler, and nanofiller addition on poly(methyl methacrylate) (PMMA) properties. The review is based on scientific reviews, papers, and abstracts, as well as studies concerning the effect of additives, fibers, fillers, and reinforcement materials on PMMA, published between 1974 and 2016. Many studies have reported improvement of PMMA denture base material with the addition of fillers, fibers, nanofiller, and hybrid reinforcement. However, most of the studies were limited to in vitro investigations without bioactivity and clinical implications. Considering the findings of the review, there is no ideal denture base material, but the properties of PMMA could be improved with some modifications, especially with silanized nanoparticle addition and a hybrid reinforcement system.

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“…[1][2][3] Despite its favorable properties such as satisfying esthetics, ease of processing, and acceptable cost, it is not considered an ideal material due to its inferior properties such as surface hardness and low impact strength. 4,5 Impact failures that happen as a result of accidental dropping of the denture lead to crack propagation which affects its clinical performance. [1][2][3][4][5][6][7][8][9][10][11][12][13] Another crucial property is surface hardness which relates to the material wear that can take place during daily denture brushing causing roughness and facilitating microbial adhesion.…”

Section: Introductionmentioning

confidence: 99%

“…4,5 Impact failures that happen as a result of accidental dropping of the denture lead to crack propagation which affects its clinical performance. [1][2][3][4][5][6][7][8][9][10][11][12][13] Another crucial property is surface hardness which relates to the material wear that can take place during daily denture brushing causing roughness and facilitating microbial adhesion. 6,7 Several techniques have been investigated to improve the properties of PMMA by incorporating suitable fillers such as fibers, metal oxides, or rubber like substances in its composition.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Impact Strength and Surface Hardness of Acrylic Resin Modified with Different Nano Materials: An In Vitro Study

Maheshwari¹,

Abrol²,

Singhal³

et al. 2019

International Journal of Prosthodontics and Restorative Dentistry

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Aim:The fracture of the denture resulting from the accidental fall on the ground is affected by the impact strength of the acrylic resin. Many attempts have been made to improve the mechanical properties of acrylic resin by reinforcing it with different materials. The aim of this study was to evaluate the effect of addition of different nano materials on the impact strength and surface hardness of the acrylic resin. Materials and methods: Fifty samples of dimensions 65 mm × 10 mm × 3 mm were made and divided into five groups. Group I is the control group of heat-activated polymethyl methacrylate (PMMA) acrylic resin, while groups II, III, IV, and V are having 1% and 3% zirconium oxide (ZrO 2 ) and silicon dioxide (SiO 2 ) nanoparticles in heat-activated PMMA by weight, respectively. A metallic block was fabricated and invested into addition silicone impression material to form a mold. The modeling wax was melted and flown into the mold cavity to form the wax block. The samples were subsequently polymerized, retrieved, finished, and polished. Impact strength and surface hardness were measured by Izod impact testing machine and Vickers hardness tester, respectively. Results: The results showed that the control group had the highest impact strength and lowest value was observed with 1% SiO 2 . The value of Vickers hardness was maximum with 1% ZrO 2 and least with the control group. The analysis of variance (ANOVA) for both the impact strength and surface hardness indicated a p value of <0.001, which is very highly significant. Conclusion: Incorporation of ZrO 2 and SiO 2 nanoparticles into the heat-activated PMMA affects the impact strength and surface hardness.

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The Effect of Silica and Prepolymer Nanoparticles on the Mechanical Properties of Denture Base Acrylic Resin

Cited by 58 publications

References 38 publications

Comparative Effect of Glass Fiber and Nano‐Filler Addition on Denture Repair Strength

Comparative Effect of Glass Fiber and Nano‐Filler Addition on Denture Repair Strength

PMMA denture base material enhancement: a review of fiber, filler, and nanofiller addition

Evaluation of Impact Strength and Surface Hardness of Acrylic Resin Modified with Different Nano Materials: An In Vitro Study

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