Ceramics-Silikáty 56 (4) 331-340 (2012)

SYNTHESIS AND CHARACTERIZATION OF BIOACTIVE GLASS/FORSTERITE NANOCOMPOSITES FOR BONE and dental IMPLANTS

R. Kamalian, A. Yazdanpanah, F. Moztarzadeh, R. Ravarian, Z. Moztarzadeh, M. Tahmasbi, M. Mozafari

In this research, bioactive glass (BG) of the type CaO–P₂O₅–SiO₂ and nanocrystalline forsterite (NF) bioceramic were successfully synthesized via sol–gel processing method. Heat-treatment process was done to obtain phase-pure nanopowders. After characterization of each sample, the nanocomposite samples were prepared by cold pressing method and sintered at 1000°C. The samples were fully characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR) analyses. The average nanocrystallite size was determined using the Debye-Scherrer’s formula 19.6 nm. The bioactivity was examined in vitro with respect to the ability of hydroxyapatite (HAp) layer to form on the surfaces as a result of contact with simulated body fluid (SBF). According to the obtained results, the prepared nanocomposite enhances the fracture toughness of the BG matrix without deteriorating its intrinsic properties as bioactivity.

Keywords: Nanocomposite, Bioactive CaO–P₂O₅–SiO₂ glass, Forsterite bioceramic, Sol-gel method, Bone implant