Sr, Mg, and Co Substituted Hydroxyapatite Coating on TiO2 Nanotubes Formed by Electrochemical Methods
Ion substituted hydroxyapatite (HA) coatings such as Sr-HA, Mg-HA and Co-HA were cathodically deposited on Titanium oxide nanotubes formed on commercially pure titanium. Thin coatings of ion substituted HA were formed on TiO2 nanotube surfaces. The nanotube surfaces were formed by electrochemical anodization technique and the HA layers were coated on the nanotubes by anodization method. While XRD confirmed the formation of the Sr-HA, Mg-HA and Co-HA hydroxyapatite coatings, EDX showed that the as-formed ion substituted hydroxyapatites to be calcium deficient. 10% Sr-HA and 10% Mg-HA showed higher adhesion strength as compared to other coatings. Moreover hydrophilicity and surface roughness of 10% Sr-HA and 10% Mg-HA were found to be better than other coatings. Higher surface roughness enhances osteoblast activities, better mechanical strength provides durability and higher hydrophilicity favors better osseointegration. For this reason 10% Sr-HA and 10% Mg-HA surfaces are envisaged to be better implants than other studied specimens.
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Document Type: Research Article
Publication date: February 1, 2016
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