NDLI: Fabrication and mechanical evaluation of hydroxyapatite/oxide nano-composite materials.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Mohamed, Khaled R. Beherei, Hanan H. El Bassyouni, Gehan T. El Mahallawy, Nahed
Description	Country affiliation: Egypt Author Affiliation: Mohamed KR ( Biomaterials Dept., National Research Centre, El-Behoos St., Cairo, Egypt. Kh_rezk1966@yahoo.com)
Abstract	In the current study, the semiconducting metal oxides such as nano-ZnO and SiO2 powders were prepared via sol-gel technique and conducted on nano-hydroxyapatite (nHA) which was synthesized by chemical precipitation. The properties of fabricated nano-structured composites containing different ratios of HA, ZnO and SiO2 were examined using X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscope (SEM) and transmission electron microscope (TEM) techniques. The effect of the variation of ratios between the three components on mechanical, microstructure and in-vitro properties was assessed to explore the possibility of enhancing these properties. The results proved that the mechanical properties exhibited an increment with increasing the ZnO content at the extent of HA. In-vitro study proved the formation and nucleation of apatite onto the surface of the fabricated composites after one week of immersion. It is concluded that HA composites containing SiO2 or SiO2/ZnO content had a suitable mechanical properties and ability to form apatite particles onto the composite surface. Based on bioactivity behavior, Si-HA is more bioactive than pure hydroxyapatite and nano-arrangements will provide an interface for better bone formation. Therefore, these nano-composites will be promising as bone substitutes especially in load bearing sites.
File Format	HTM / HTML
ISSN	09284931
Issue Number	7
Volume Number	33
e-ISSN	18730191
Journal	Materials Science and Engineering: C
Language	English
Publisher	Elsevier
Publisher Date	2013-10-01
Publisher Place	Netherlands
Access Restriction	Subscribed
Subject Keyword	Discipline Materials Science Biocompatible Materials Chemistry Durapatite Materials Testing Methods Mechanical Phenomena Nanocomposites Oxides Ultrastructure Spectroscopy, Fourier Transform Infrared X-ray Diffraction Journal Article
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Biomaterials Condensed Matter Physics Bioengineering Mechanical Engineering

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