Effects of Incorporation of Titanium Dioxide Nanoparticles on Mechanical Properties of Conventional Glass Ionomer Cement

Narges Panahandeh; Elham Hasani; Saeed  Safa; Mojtaba Hashemi; Hassan Torabzadeh

doi:10.18502/jimc.v7i1.14206

Narges Panahandeh Dental Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Elham Hasani Dental Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Saeed Safa Young Researchers and Elite Club, South Tehran Branch, Islamic Azad University, Tehran, Iran
Mojtaba Hashemi Dental Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Hassan Torabzadeh Iranian Center for Endodontics research, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

DOI: https://doi.org/10.18502/jimc.v7i1.14206

Keywords: Glass ionomer cements, Hardness, Roughness, Titanium dioxide nanoparticles

Abstract

Background: Due to the poor mechanical properties of Glass Ionomer Cement (GICs), their use is limited to low stress-bearing areas. This study aimed to assess the effect of the addition of Titanium Dioxide (TiO₂) nanoparticles on the flexural strength and surface hardness of GIC.

Methods: In this in vitro study, 3, 5, and 10 wt.% TiO₂ nanoparticles were added to Fuji II conventional GIC powder. The purity and composition of the as-synthesized titania were investigated by using XRD and FT-IR tools. The homogeneity of powder particles within the used matrix was evaluated under a Scanning Electron Microscope (SEM).

Results: The SEM micrographs confirmed the homogenous mixing of TiO₂ nanoparticles with GIC powder.

Conclusion: Nevertheless, the flexural strength of experimental groups was not significantly different from that of the control group (p=0.384). However, the surface hardness of experimental groups was decreased in comparison with that of the control group (p<0.001).