LAUSR

Abstract Nanostructured bioceramics are expected to have better bioactivity than coarser crystals. This work aims to prepare, characterize and evaluate the bioactivity of bredigite nanopowder, synthesized by modified sol–gel method. In vitro bioactivity assessment was performed by soaking the samples in the simulated body fluid (SBF) and immersing it for apatite formation on the surface. X-ray diffraction (XRD), and field emission scanning electron microscopy (FESEM) techniques were utilized to characterize the nanopowders. The morphological and compositional changes of the samples, after soaking in SBF, were studied and analyzed by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), energy dispersive spectroscopy (EDS), and inductively-coupled plasma optical emission spectroscopy (ICP-OES). Results showed that the particle size of pure bredigite was around 38–48 nm. During immersion in SBF, the dissolution rate of the bredigite nanopowder was higher than that of the bredigite micro size powder, and apatite was formed on it after 3 days of soaking.