Maisch, Tim and Wagner, J. and Papastamou, V. and Nerl, H. -J. and Hiller, K. -A. and Szeimies, R. -M. and Schmalz, G. (2009) Combination of 10% EDTA, Photosan, and a blue light hand-held photopolymerizer to inactivate leading oral bacteria in dentistry in vitro. JOURNAL OF APPLIED MICROBIOLOGY, 107 (5). pp. 1569-1578. ISSN 1364-5072,
Full text not available from this repository. (Request a copy)Abstract
Aims: The goal of this study was to investigate the phototoxicity of Photosan in combination with EDTA and a hand-held photopolymerizer used in dentistry for light-curing resins against leading key pathogens in caries, endodontic treatment failures, and periodontitis respectively. Methods and Results: Cellular uptake of Photosan was detected by fluorescence spectroscopy for Streptococcus mutans and Enterococcus faecalis but not for Aggregatibacter actinomycetemcomitans. Addition of 10% EDTA enabled the uptake of Photosan by A. actinomycetemcomitans. Killing of S. mutans and E. faecalis mediated by Photosan and blue light was concentration and light dose dependent, achieving a >= 99 center dot 9% (>= 3 log(10) reduction) efficacy of bacteria killing. In the presence of 10% EDTA, Photosan induced a reduction of >= 4 log(10) in the viability of A. actinomycetemcomitans at a concentration of 50 mu g ml-1, upon activation at a dose of 9 center dot 65 J cm-2 for 60 s. EDTA alone, light alone, and Photosan alone were not able to kill bacteria. Conclusions: Ten per cent EDTA and Photosan cause a potent phototoxicity against oral bacteria upon illumination with a photopolymerizer. Significance and Impact of the Study: Increasing antibiotic resistance and insufficient drug concentrations within the sulcus fluid are responsible for lacking antimicrobial efficacy. This study provides useful information that combination of Photosan, EDTA, and a photopolymerizer may be a potentially powerful tool for the efficient destroying of key oral bacteria.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | GRAM-NEGATIVE BACTERIA; ROOT-CANAL TREATMENT; SINGLET OXYGEN; PHOTODYNAMIC THERAPY; STREPTOCOCCUS-MUTANS; ENDODONTIC TREATMENT; DENTAL-CARIES; PHOTOSENSITIZERS; PERIODONTITIS; ENTEROCOCCUS; chelation of metal ions; oral bacteria; outer membrane permeability; photodynamic inactivation; photopolymerizer |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Dermatologie und Venerologie Medicine > Lehrstuhl für Zahnerhaltung und Parodontologie > Dr. rer. nat. Karl-Anton Hiller |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 02 Sep 2020 09:34 |
| Last Modified: | 02 Sep 2020 09:34 |
| URI: | https://pred.uni-regensburg.de/id/eprint/28202 |
Actions (login required)
 |
View Item |
