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http://dx.doi.org/10.5933/JKAPD.2022.49.2.149

Recovery of Streptococcus Mutans Biofilm after Photodynamic Therapy with Erythrosine and LED Light Source  

Yongwook, Shin (Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University)
Howon, Park (Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University)
Juhyun, Lee (Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University)
Siyoung, Lee (Department of Microbiology and Immunology, College of Dentistry, Gangneung-Wonju National University)
Publication Information
Journal of the korean academy of Pediatric Dentistry / v.49, no.2, 2022 , pp. 149-157 More about this Journal
Abstract
The aim of this study was to evaluate the effects of erythrosine-mediated photodynamic therapy (PDT) on Streptococcus mutans biofilm recovery by counting its colony-forming units (CFUs) and via confocal laser scanning microscopy analysis at different time points following PDT. In PDT, photosensitizer was an erythrosine. S. mutans ATCC25175 biofilms were irradiated using an LED curing light. Chlorhexidine (CHX) was used as positive control. After each antimicrobial treatment, samples were cultured to allow biofilm recovery. Viability was measured by calculating the CFU counts after treatment and after every 3 hours for up to 24 hours. Immediately after treatment, the PDT and CHX groups showed equally significant decreases in S. mutans CFU counts compared to the negative control. After 12 hours of reculture, the PDT group showed no significant difference in the decrease in CFU count compared to the negative control, whereas the CHX group showed significantly lower CFU counts throughout the 24-hour period. Erythrosine-mediated PDT can effectively inhibit S. mutans biofilm formation. However, biofilm recovery occurred earlier in the CHX group after PDT. This study provides insights into the clinical effectiveness of PDT in preventing dental caries.
Keywords
Photodynamic therapy; Streptococcus mutans; Biofilm recovery; Erythrosine;
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Times Cited By KSCI : 8  (Citation Analysis)
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