NDLI: Microstructure and cytotoxicity evaluation of duplex-treated silver-containing antibacterial TiO2 coatings.

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Microstructure and cytotoxicity evaluation of duplex-treated silver-containing antibacterial TiO2 coatings.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Zhang, Xiangyu Wu, Haibo Geng, Zhenhua Huang, Xiaobo Hang, Ruiqiang Ma, Yong Yao, Xiaohong Tang, Bin
Description	Country affiliation: China Author Affiliation: Zhang X ( Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China.); Wu H ( Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China.); Geng Z ( Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China.); Huang X ( Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China.); Hang R ( Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China.); Ma Y ( Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China.); Yao X ( Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China.); Tang B ( Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China. Electronic address: tangbin6405@sina.com.)
Abstract	Implant-related infection is one of the most common and serious complications associated with biomedical implantation. To prevent bacterial adhesion, a series of porous TiO2 coatings with different concentrations of silver (designated as M0, M1, M2 and M3) were prepared on pure titanium substrates by a duplex-treatment technique combining magnetron sputtering with micro-arc oxidation. All coatings are porous with pore size less than 5 µm and the concentrations of silver in the M0, M1, M2 and M3 are 0, 0.95, 1.36 and 1.93 wt.%, respectively. Silver is found to be distributed throughout the thickness of the coatings by scanning electron microscopy. The release of silver from the TiO2 coatings was confirmed by an inductively-coupled plasma mass spectroscopy. The antibacterial effects of these coatings were tested against Gram-positive Staphylococcus aureus (S. aureus) and Gram-negative Escherichia coli (E. coli), and the cytotoxicity was evaluated using the mouse pre-osteoblast cells. The results indicate that the antibacterial activities of TiO2 coatings are greatly improved due to the incorporation of silver. No cytotoxic effect is found for the M1 surfaces from the observation of pre-osteoblast cell by MTT assay and fluorescence microscopy. Although the M2 and M3 coatings appeared to be toxic for pre-osteoblast cells after 1 day in culture, the cell viability on M2 and M3 surfaces was greatly raised after culturing for 2 days. Our results suggested that the TiO2 coatings incorporated with an optimum amount of silver can possess excellent antibacterial activities without cytotoxic effect, which has promising applications in biomedical devices.
File Format	HTM / HTML
ISSN	09284931
Volume Number	45
e-ISSN	18730191
Journal	Materials Science and Engineering: C
Language	English
Publisher	Elsevier
Publisher Date	2014-12-01
Publisher Place	Netherlands
Access Restriction	Subscribed
Subject Keyword	Discipline Materials Science Anti-bacterial Agents Chemistry Coated Materials, Biocompatible Silver Compounds Titanium 3t3 Cells Animals Pharmacology Bacterial Adhesion Drug Effects Cell Survival Escherichia Coli Mice Microbial Sensitivity Tests Microscopy, Electron, Scanning Molecular Structure Osteoblasts Cytology Metabolism Porosity Prostheses And Implants Staphylococcus Aureus Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Biomaterials Condensed Matter Physics Bioengineering Mechanical Engineering

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