Apatite formation on TiO2 anatase microspheres |
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Authors: | Mehrdad Keshmiri Tom Troczynski |
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Affiliation: | Department of Metals and Materials Engineering, University of British Columbia, 309-6350 Stores Road, Vancouver, BC, Canada V6T 1Z4 |
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Abstract: | Titanium dioxide (TiO2) coatings have been long considered as biocompatible interfaces to promote the physico-chemical bonding between the bone tissues and implant material (e.g., titanium and stainless steel). Monodispersed TiO2 (anatase, the low temperature polymorph of TiO2) microspheres, produced in the form of colloidal precipitates, were deposited on different substrates and apatite formation was induced on the resulted surface by immersing the coated substrates in simulated body fluid solution. Analytical and microstructural investigations, conducted by X-ray diffraction, energy depressive X-ray spectroscopy and scanning electron microscopy techniques, showed considerable higher rates of apatite formation, in vitro, on the anatase microspheres compared to the sol-gel-derived thin films of the same oxide. We concluded that the particular surface morphology of the packed TiO2 microspheres, promotes a faster apatite formation in vitro. |
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Keywords: | B123 T250 P308 |
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