Silver nanoparticle incorporation effect on mechanical and thermal properties of denture base acrylic resins

Abstract

Objective The aim of the present study was to evaluate the mechanical and thermal characteristics of two denture base acrylic resins containing silver nanoparticles (AgNPs).Material and Methods Two different acrylic denture base resins (heat-polymerized and microwave polymerized) containing 0.3, 0.8 and 1.6 wt% AgNPs were evaluated for flexural strength, elastic modulus and impact strength. The glass transition temperature (Tg) and relative heat capacity (Cp) of the samples were determined from the Differential Scanning Calorimetry (DSC) results. For statistical analysis, two-way ANOVA and Tukey-HSD tests were performed.Results Addition of 0.8% and 1.6% AgNPs in microwave-polymerized resin significantly decreased the transverse strength and elastic modulus. In terms of impact strength, the addition of AgNPs has no effect on both resin groups. Glass transition temperature (Tg) was decreased with the addition of AgNPs for both denture base resins.Conclusions The incorporation of AgNPs, generally used for antimicrobial efficiency, affected the transverse strength of the denture base acrylic resins depending on the concentration of nanoparticles. Tg was decreased with the addition of AgNPs for both denture base resins.

Effect of Henna Addition on the Surface Roughness and Hardness of Polymethylmethacrylate Denture Base Material: Anin vitroStudy

“…38 Recently, nanotechnological products have been incorporated into PMMA to induce antimicrobial properties; their effects on the mechanical properties have been evaluated. 39,40 For example, Köroğlu et al 39 studied the effect of silver nanoparticle (AgNP) addition on PMMA's mechanical and thermal characteristics, concluding that the incorporation of AgNPs, which are generally used for antimicrobial efficiency, affected the mechanical properties of the PMMA denture base depending on the concentration of nanoparticles. In contrast, Gad et al 40 reported that zirconia nanoparticles have an antifungal effect without affecting mechanical properties.…”

Comparison of mechanical properties of heat‐polymerized acrylic resin with silver nanoparticles added at different concentrations and sizes

“…In addition, high concentrations of nanoparticles produce agglomeration sites that adversely affect the material's properties. Moreover, it has been suggested that low concentartion of AgNP would reduce material costs and amount of monomer . Therefore, 0.05% AgNPs and 0.2% AgNPs were preferred in the present study.…”

“…However, when the AgNP dimensions are less than 3 nm, they are more cytotoxic than larger particles (25 nm) . AgNPs with a mean average size of 38 and 68 and less than 35 and 50 nm were used in previous studies . Therefore, 40, 50, and 60 nm AgNPs were preferred and the large AgNPs were not preferred in the current study.…”

“…A Charpy‐type impact tester (Coesfeld,Pendulum Impact Tester, Dortmund, Germany) was used for IS test. IS was calculated using the following formula where E is the energy, w is the width (6 mm), and t is the tickness of the specimen (4 mm).…”

Effect of Henna Addition on the Surface Roughness and Hardness of Polymethylmethacrylate Denture Base Material: An In-vitro Study

“…For example, Köroğlu et al (2016) studied the effect of silver nanoparticles' (AgNPs) addition on PMMA's mechanical and thermal characteristics, concluding that the incorporation of AgNPs, which are generally used for antimicrobial efficiency, affected the mechanical properties of the PMMA denture base depending on the concentration of nanoparticles.…”