Influence of Incorporation of Silica and Zirconia Nanoparticles on Some Physical and Mechanical Properties of Thermoplastic Resin Material

Abstract

Objective: This study was aimed to evaluate the effect of incorporation of two-different nanoparticles (NPs); silica (SiO 2 ), and zirconia (ZrO 2 ) on flexural strength, impact strength, as well as, water sorption and solubility of thermoplastic resin material.Materials and Methods: Two nanoparticles SiO 2 -NPs, and ZrO 2 -NPs (Nano-gate Company, Egypt) were incorporated into thermoplastic resin with different concentration (1.5 and 7 wt.%). This study was divided into five main groups; unmodified "control group" and four modified groups according to the type and concentration of the incorporated nanoparticles. Results:The results of this study revealed that the incorporation of 1.5 wt.% SiO 2 -NPs significantly improves the flexural strength of thermoplastic resin. While the incorporation of SiO 2 -NPs and ZrO 2 -NPs nanoparticles insignificantly decreases its impact strength. However, they significantly increase water sorption and solubility of thermoplastic resin. Conclusion: The incorporation of nanoparticles into thermoplastic resin at different concentrations could negatively affect its flexural strength, impact strength, as well as its water sorption and solubility.

Effect of Zirconium Oxide Nano-Fillers on Dimensional Accuracy of Acrylic Resin Maxillary Complete Dentures: An in vitro study

“…The presence of fillers causes the separation of the polymer chains further apart from each other and increasing spaces between the polymer chains which facilitate water penetration due to the small size of water molecules (3) . Also, fillers addition may contribute to degree of denture porosity which increases water sorption (9,18) .This result was in agreement with a study that evaluate the effect of filler reinforcement of acrylic denture base material on water sorption, dimensional changes and transverse strength (14) , as well as another two studies that reported an increase in water sorption within the limit of ADA specifications (11) .…”

“…Nanotechnology is applied in the field of prosthodontics for material improvement purposes to enhance the properties and behavior of PMMA (9,10) depending on several features including polymerparticle interface, particle size and shape, fabrication technique, and particle dispersion in the PMMA matrix (11) . One of the recent approaches for enhancement of acrylic resins properties is the addition of zirconium oxide as nanofillers.…”