Abstract
Titanium dioxide (TiO 2) 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 TiO 2 (anatase, the low temperature polymorph of TiO 2) 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 TiO 2 microspheres, promotes a faster apatite formation in vitro.
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