Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jcis.2013.11.062
Title: Bacterial and osteoblast behavior on titanium, cobalt-chromium alloy and stainless steel treated with alkali and heat: A comparative study for potential orthopedic applications
Authors: Hu, X.
Neoh, K.G. 
Zhang, J.
Kang, E.-T. 
Keywords: Alkali
Anatase
Apoptosis
Bacterial adhesion
Bactericidal effects
Heat treatment
Reactive oxygen species
Issue Date: 1-Mar-2014
Source: Hu, X., Neoh, K.G., Zhang, J., Kang, E.-T. (2014-03-01). Bacterial and osteoblast behavior on titanium, cobalt-chromium alloy and stainless steel treated with alkali and heat: A comparative study for potential orthopedic applications. Journal of Colloid and Interface Science 417 : 410-419. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jcis.2013.11.062
Abstract: Hypothesis: Anatase-modified titanium (Ti) substrates have been found to possess antibacterial properties in the absence of ultraviolet irradiation, but the mechanism is not known. We hypothesize that this is due to the bactericidal effects of reactive oxygen species (ROS) generated by the surface anatase. Experiments: Alkali and heat treatment was used to form anatase on Ti surface. The generation of ROS, and the behavior of bacteria and osteoblasts on the anatase-modified Ti were investigated. Cobalt-chrome (Co-Cr) alloys and stainless steel (SS) were similarly treated with alkali and heat, and their surface properties and effects on bacteria and osteoblasts were compared with the results obtained with Ti. Findings: The anatase-functionalized Ti substrates demonstrated significant bactericidal effects and promoted apoptosis in osteoblasts, likely a result of ROS generated by the anatase. The alkali and heat-treated Co-Cr and SS substrates also reduced bacterial adhesion but were not bactericidal. This effect is likely due to an increase in hydrophilicity of the surfaces, and no significant ROS were generated by the alkali and heat-treated Co-Cr and SS substrates. The treated Co-Cr and SS substrates did not induce significant apoptosis in osteoblasts, and thus with these properties, they may be promising for orthopedic applications. © 2013 Elsevier Inc.
Source Title: Journal of Colloid and Interface Science
URI: http://scholarbank.nus.edu.sg/handle/10635/63523
ISSN: 00219797
DOI: 10.1016/j.jcis.2013.11.062
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