Abstract
Titanium and its alloys, the most commonly used materials for dental and orthopaedic implants are generally coated with bioactive materials such as sol–gel derived titania, silica and calcium phosphate in order to render these materials bioactive. In the present work a coating containing nanosized titania particles having anatase structure was developed on titanium substrate by thermal decomposition of titanium tetrachloride in isopropanol. A modified titania–silica mixed oxide coating was developed by incorporating the required amount of silica in the coating system. The presence of silica at small weight percentage caused improvement of adhesion and corrosion resistance of the coating. In vitro bioactivity tests were performed in 1.5 Kokubo’s simulated body fluid after alkaline treatment of the titania/titania–silica coatings and the performance was compared with that of the titania coating developed by simple thermal oxidation. TF-XRD, FTIR and SEM-EDAX were used to investigate the microstructural morphology and crystallinity of the coatings. Elemental analysis of simulated body fluid was carried out using ICP-AES and spectrophotometry. Enhanced biogrowth was facilitated on the titania coating incorporated with low silica content.
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Shibli, S.M.A., Mathai, S. Development and bio-electrochemical characterization of a novel TiO2–SiO2 mixed oxide coating for titanium implants. J Mater Sci: Mater Med 19, 2971–2981 (2008). https://doi.org/10.1007/s10856-008-3409-2
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DOI: https://doi.org/10.1007/s10856-008-3409-2