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Photocatalytic antibacterial effect of TiO2 film formed on Ti and TiAg exposed to Lactobacillus acidophilus

Authors
 Jung-Yoon Choi  ;  Kyung-Ho Kim  ;  Kyoung-Nam Kim  ;  Keun-Taek Oh  ;  Kwang-Chul Choy 
Citation
 JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS, Vol.80B(2) : 353-359, 2007 
Journal Title
 JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS 
ISSN
 1552-4973 
Issue Date
2007
MeSH
Alloys ; Anti-Bacterial Agents/pharmacology ; Anti-Bacterial Agents/radiation effects ; Dental Materials*/pharmacology ; Dental Materials*/radiation effects ; Humans ; In Vitro Techniques ; Lactobacillus acidophilus/drug effects* ; Materials Testing ; Microscopy, Electron, Scanning ; Orthodontic Appliances/microbiology ; Oxidation-Reduction ; Photochemistry ; Silver ; Titanium*/pharmacology ; Titanium*/radiation effects ; Ultraviolet Rays
Keywords
titanium ; TiAg alloy ; oxidation ; surface modification ; antimicrobial
Abstract
When irradiated under near-ultraviolet (UV) light, TiO2 exhibits strong bactericidal activity. The TiO2 photocatalyst would be effective on orthodontic appliances after its antibacterial effect on the carcinogenic microorganism Lactobacillus acidophilus is evaluated. To compare the antibacterial effect of two crystalline forms of TiO2, rutile and anatase, thermal oxidation and anodic oxidation were employed to form each structure, respectively. The antibacterial effect of TiO2 film on TiAg was also compared with that on Ti. Bacterial solutions were pipetted onto the TiO2-coated specimen and illuminated with UVA (2 × 15 W, black light, 356 nm) up to 100 min and the reaction solutions were incubated to count the colony-forming units. The antibacterial activity of the coated specimens was similar to that of the uncoated group. The antibacterial activity of the coated specimens of TiAg was not different from that of Ti. TiO2 coatings formed on both Ti and TiAg specimens did not exhibit cytotoxicity on the L-929 cells of mice.
Full Text
http://onlinelibrary.wiley.com/doi/10.1002/jbm.b.30604/abstract
DOI
10.1002/jbm.b.30604
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Dental Biomaterials and Bioengineering (치과생체재료공학교실) > 1. Journal Papers
Yonsei Authors
Kim, Kyoung Nam(김경남)
Kim, Kyung Ho(김경호) ORCID logo https://orcid.org/0000-0002-8154-2041
Choy, Kwang Chul(최광철)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/96235
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