Journal
MATERIALS & DESIGN
Volume 44, Issue -, Pages 461-468Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2012.08.020
Keywords
Nano-composites; Hydroxyapatite; In vitro; Transmission electron microscopy
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In this study, the nano sized hydroxyapatite (HA) and calcium silicate (CS) powders prepared by both chemical precipitation and sol-gel methods respectively. Biphasic nano-composites materials containing different ratios of HA and CS were fabricated and assessed using X-ray diffraction (XRD), Fourier transmission infrared reflectance (FT-IR), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) techniques. The effect of variation of ratios between HA and CS on mechanical properties, microstructure and in vitro study was studied. The results proved that the mechanical properties were enhanced with increasing the CS ratio in the composite. In vitro study proved the formation and nucleation of apatite onto composites surfaces which contain low content of CS after one week of immersion. Finally, it is concluded that the HACS composites containing high HA content at the expense of CS content will be promising for bone substitute's applications, especially in load bearing sites. (C) 2012 Elsevier Ltd. All rights reserved.
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