Author/Authors :
Bahremandi Tolou، N. نويسنده Biomaterials Research Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran , , Fathi، M. H. نويسنده Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran Fathi, M. H. , Monshi، A. نويسنده , , Mortazavi، V. S. نويسنده Torabinejad Dental Research Center and Department of Operative Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran , , Shirani، F. نويسنده Torabinejad Dental Research Center and Department of Operative Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran , , Mohammadi Sichani، M. نويسنده Department of Microbiology, Falavarjan Branch-Islamic Azad University , Esfahan, Iran ,
Abstract :
In recent years, there have been many attempts to improve the properties of dental amalgam. The aim of the
present investigation was fabrication and characterization of dental amalgams containing TiO2 nanoparticles and
evaluation of their compressive strength, antibacterial and corrosion behavior. In this experimental research, TiO2 nanoparticles (TiO2 NPs) were added to reference amalgam alloy powder and then, dental amalgam was prepared. In
order to investigate the effect of TiO2 NPs on properties of dental amalgam, 0, 0.5, 1, 2 and 3 wt. % of TiO2 NPs were
added to amalgam alloy powder and the prepared composite powder was triturated by a given percent of mercury. Xray
diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy-Dispersive Spectroscopy (EDS) techniques
were used to characterize the prepared specimens. Potentiodynamic polarization corrosion tests were performed in the
Normal Saline (0.9 wt. % NaCl) Solutions as electrolytes at 37°C. The results showed that the corrosion behavior of
the dental amalgam with 0.5 or 1 wt. % TiO2 NPs is similar to the corrosion behavior of the reference amalgam, while
with increasing the weight percent of TiO2 NPs, the corrosion rate increases. Also, the results of this investigation
indicated that adding TiO2 NPs in amounts of up to 1 wt. % to amalgam alloy powder improve compressive strength
of dental amalgam and has no destructive influence on its corrosion behavior. As well as, according to antibacterial
results, TiO2 NPs can increase the biocompatibility and antibacterial activity of dental amalgam. The results of present
study suggest that amalgam/ TiO2 NPs nanocomposite with 1% of TiO2 NPs could be regarded as a biocompatible and
bioactive dental material that provide better characters for dental applications.
