Publicação: Dental implants: Surface modification of cp-Ti using plasma spraying and the deposition of hydroxyapatite
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The commercial pure titanium (cp-Ti) is currently being used with great success in dental implants. In this work we investigate how the cp-Ti implants can be improved by modifying the metal surface morphology, on which a synthetic material with properties similar to that of the inorganic part of the bone, is deposited to facilitate the bone/implant bonding. This synthetic material is the hydroxyapatite, HA, a calcium-phosphate ceramic. The surface modification consists in the application of a titanium oxide (TiO2) layer, using the thermal aspersion - plasma spray technique, with posterior deposition of HA, using the biomimetic method. The X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) with Energy Dispersive X-ray (EDX) and Diffuse Reflectance Infrared Fourier Transform (DRIFT) techniques have been used for characterizing phases, microstructures and morphologies of the coatings. The TiO2 deposit shows a mixture of anatase, rutilo and TiO2-x phases, and a porous and laminar morphology, which facilitate the HA deposition. After the thermal treatment, the previously amorphous structured HA coating, shows a porous homogeneous morphology with particle size of about 2-2.5 μm, with crystallinity and composition similar to that of the biological HA.
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Biomaterials, Hydroxyapatite, Surface modification, Titanium oxide, Biomimetic method, Calcium phosphate ceramic, Diffuse reflectance infrared Fourier transform, Bone, Deposition, Energy dispersive spectroscopy, Fourier transform infrared spectroscopy, Morphology, Plasma spraying, Scanning electron microscopy, Surface treatment, Titanium, Titanium dioxide, X ray diffraction analysis, Dental prostheses
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Inglês
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Materials Science Forum, v. 416-418, n. 1, p. 669-674, 2003.
