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Precipitation of bone-like apatite on anodised titaniumin simulated body fluid under UV irradiation

Lee, T. C. and Koshy, P. and Abdullah, H. Z. and Idris, M. I. (2016) Precipitation of bone-like apatite on anodised titaniumin simulated body fluid under UV irradiation. Surface & Coatings Technology, 301. pp. 20-28. ISSN 02578972

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Fabricating a photocatalytic oxide layer on biomaterial surfaces has recently attracted a great deal of attention owing to its effect in accelerating the osseointegration process. Anodic oxidation is awidely used electrochemical method to deposit ceramic coatings of photocatalytic titania on titaniummetal substrates. The current study aims to investigate the effect of UV irradiation during in vitro testing on the precipitation of bone-like apatite on the anodised surface. High purity titanium foils were anodised with varying voltages (50–350 V) in a mixture of 0.04 M β-glycerophosphate disodium salt pentahydrate (β-GP) and 0.4 M calcium acetate monohydrate (CA) for 10 min. Subsequently, the anodised titanium foils were soaked in simulated body fluid (SBF) for 7 days with illumination under ultraviolet light C. The titanium foil produced using high voltage (350 V) appeared to be highly porous and demonstrated high crystallinity as well high hydrophilic properties. After soaking in SBF for 7 days, highly crystallised bone-like apatite was covered on the surface of anodised titanium. Interestingly, the smooth and partially porous surface of the anodised titanium was observed to be fully covered by the bone-like apatite layer, contradicting previous findings that smooth surfaces lack sufficient nucleation sites needed for the growth of bone-like apatite. The suggestedmechanismfor the formation of bone-like apatite under UV irradiation is illustrated in this article. The findings of this study indicate that UV irradiation is able to accelerate the formation of bone-like apatite on the surface of titanium.

Item Type: Article
Uncontrolled Keywords: Anodic oxidation; titanium dioxide; UV irradiation; simulated body fluid; bone-like apatite
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Materials Engineering and Design
Depositing User: Mr. Mohammad Shaifulrip Ithnin
Date Deposited: 13 Aug 2018 03:24
Last Modified: 13 Aug 2018 03:24
URI: http://eprints.uthm.edu.my/id/eprint/8834
Statistic Details: View Download Statistic

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