International Journal of Oral Biology

The Korean Academy of Oral Biology (대한구강생물학회)
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The Effect of Erythrosine-mediated Photodynamic Therapy on Intraorally Formed Biofilm on Titanium Surface

  • Park, Se-Hwan (Department of Periodontology, Research Institute for Oral Sciences, College of Dentistry, Gangneung-Wonju National University) ;
  • Lee, Si-Young (Department of Oral Microbiology, Research Institute for Oral Sciences, College of Dentistry, Gangneung-Wonju National University) ;
  • Chang, Beom-Seok (Department of Periodontology, Research Institute for Oral Sciences, College of Dentistry, Gangneung-Wonju National University) ;
  • Um, Heung-Sik (Department of Periodontology, Research Institute for Oral Sciences, College of Dentistry, Gangneung-Wonju National University) ;
  • Lee, Jae-Kwan (Department of Periodontology, Research Institute for Oral Sciences, College of Dentistry, Gangneung-Wonju National University)
  • Received : 2012.07.12
  • Accepted : 2012.09.11
  • Published : 2012.09.30
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Abstract

The purpose of this study was to assess the efficacy of photodynamic therapy (PDT) using erythrosine and a halogen light source to treat a biofilm formed on a machined surface titanium disk in vivo. Ten volunteers carried an acrylic appliance containing six machined surface titanium disks on the upper jaw over a period of five days. After the five days of biofilm formation period, the disks were removed. PDT using 20 ${\mu}M$ erythrosine and halogen light was then applied to the biofilms formed on the disks. Experimental samples were divided into a negative control group (no erythrosine and no irradiation), E0 group (erythrosine 60s + no irradiation), E30 group (erythrosine 60s + halogen light 30s), and E60 group (erythrosine 60s + halogen light 60s). Following PDT, the bacteria in the biofilm were found to be detached from each disk. Each suspension with detached bacteria were diluted and cultivated on a blood-agar plate for five days under anaerobic conditions. The cultivated bacterial counts in the E60 group were significantly lower than the control group (86.4%) or E0 group (76.7%). In the experimental groups also, the light exposure time and bacterial counts showed a negative correlation. In conclusion, PDT using erythrosine and halogen light has bactericidal effects on biofilms formed on a titanium disk in vivo. Notably, applying 20 ${\mu}M$ erythrosine and 60 seconds of halogen light irradiation had a significantly potent effect.

Keywords

References

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