Selective properties of MTA with TiO 2 nanoparticles Effect of the TiO 2 nanoparticles on the selected physical properties of mineral trioxide aggregate

Abstract

Abstract Background: Some of the efforts to improve the properties of Mineral Trioxide Aggregate (MTA) include incorporation of some nanoparticles such as Titanium dioxide (TiO 2 ). The aim of this study was to evaluate the effect of TiO 2 nanoparticles on the setting time, working time, push-out bond strength and compressive strength of MTA. Material and Methods: The physical properties to be evaluated were determined using the ISO 6786:2001 and 9917 specifications. Fifteen samples of each material (MTA or MTA with 1% weight ratio of TiO 2 Nanoparticles) were prepared for any evaluated physical property. Data were analyzed using descriptive statistics and T-test. Statistical significance was set at P<0.05. Results: There was the significant effect of the material type (presence and absence of TiO 2 nanoparticles) on the push-out bond strength, compressive strength, working time and setting time, with significantly higher values achieved in the group with TiO 2 nanoparticles than the group without these particles (P=0.01 for the setting time and compressive strength, P=0.03 for the working time and P=0.001 for the bond strength). Conclusions: Based on the findings of this in vitro study, incorporation of the TiO 2 nanoparticles with weight ratio of 1% increased the setting time, working time, compressive strength and push out bond strength of MTA