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A new method for photodynamic disinfection of prosthetic constructions and impressions in prosthetic dentistry


Angelina P. Vlahova1 / Christo K. Kisov2 / Elka V. Popova3 / Irina A. Haydushka4 / Vanya N. Mantareva5
1Department of Prosthetic Dentistry
2Department of Prosthetic Dentistry
3Department of Periodontology and Oral Mucosa Diseases, Faculty of Dental Medicine, Plovdiv
4Department of Microbiology and Immunology, Medical University, Plovdiv
5Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria
Correspondence and reprint request to: A. Vlahova, Department of Prosthetic Dentistry, Faculty of Dental Medicine,Medical University, Plovdiv; E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it. Vassil Aprilov St, 4002 Plovdiv, Bulgaria

Citation Information: Folia Medica. Volume 54, Issue 1, Pages 51–57, ISSN (Online) 1314-2143, ISSN (Print) 0204-8043, DOI: 10.2478/v10153-011-0078-6, October 2012
Publication History:
Published Online:



INTRODUCTION: Photodynamic therapy is a topical treatment of pathogens that involves the use of a photoactive dye (photosensitizer), which is non-toxic when not exposed to light and activated by light of a specifi c wavelength in the presence of oxygen. The highly cytotoxic oxygen species generated by the induced photophysical processes inactivate the pathogenic cells.

The PURPOSE of this study was to present a new method we developed for photodynamic disinfection of prostheses and impressions in prosthetic dentistry and to assess its effectiveness in comparison with some conventional methods of disinfection.

MATERIALS AND METHODS: The method was developed on the basis of series of experimental studies (30 experiments for each type of disinfectant, 30 controls with no disinfection for each material, and 30 direct cultures of each test microorganism - MRSA, P. aeruginosa and C. albicans) using standard test specimens made of prosthesis plastic and impression materials.

RESULTS: The new method of photodynamic disinfection with GaPc1 as photosensitizer was 100% effi cient in C-silicones, A-silicones and polyethers, but not in alginates (40%). To plastics the photodynamic method shows the same effi ciency as the conventional disinfectants of hypochlorite solutions and denture cleansing tablets (100% effect).

CONCLUSION: The method of photodynamic disinfection we developed is a good therapeutic choice against orally transmitted diseases in prosthetic dentistry.