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Synthesis, Characterization, in Vitro Bioactivity and Biocompatibility Evaluation of Hydroxyapatite/Bredigite (Ca7mgsi4o16) Composite Nanoparticles Publisher



Kouhi M1 ; Shamanian M1 ; Fathi M1, 2 ; Samadikuchaksaraei A3, 4, 5 ; Mehdipour A3, 4
Authors
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Authors Affiliations
  1. 1. Biomaterials Research Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan, 8415683111, Iran
  2. 2. Dental Materials Research Center, Isfahan University of Medical Sciences, Isfahan, 8174673461, Iran
  3. 3. Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, 1445613131, Iran
  4. 4. Department of Tissue Engineering and Regenerative Medicine, Iran University of Medical Sciences, Tehran, 1445613131, Iran
  5. 5. Department of Medical Biotechnology, Iran University of Medical Science, Tehran, 1445613131, Iran

Source: JOM Published:2016


Abstract

Silicate-based bioceramics have been found to possess excellent apatite-forming ability, and they can stimulate cell proliferation and osteogenic differentiation. In this study, bredigite (Ca7MgSi4O16) nanoparticles were synthesized and incorporated into a hydroxyapatite (HA)-based matrix to produce composite nanoparticles with improved bioactivity and biocompatibility. HA/bredigite nanoparticles containing 25% and 50% bredigite were synthesized by using the sol–gel method. X-ray diffraction, transmission electron microscopy, scanning electron microscopy, energy-dispersive x-ray spectroscopy, and Fourier transform infrared techniques were used to study the phase structure, morphology, and structural properties of prepared nanoparticles. Results indicated that HA/bredigite nanoparticles with an average particle size of less than 50 nm and homogeneous distribution of bredigite were successfully synthesized. Obtained results also revealed that the presence of bredigite led to a small increase in HA lattice parameters and to a decrease in the agglomeration of composite nanoparticles. The in vitro bioactivity studies performed in the simulated body fluid showed that composite nanoparticles had higher apatite-forming ability than pure HA. The results of a cell proliferation assay revealed that the proliferation of mesenchymal stem cells in the extract of HA/bredigite was significantly higher than those in the extract of the initial HA and control group after 72 h. As the properties of HA/bredigite nanoparticles were highly improved, compared with pure HA, it is concluded that these composite nanoparticles could potentially be good candidates for use as effective bioactive materials in bone regeneration applications. © 2016, The Minerals, Metals & Materials Society.
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