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The device, offered for reviewing, was designed and developed for photodynamic therapy of oral cavity mucous diseases and for laboratory experiments on the red light influence on the bacterial colonies in presence of a dye. The device has rather simple construction, it is cheap but convenience in use.

The work is devoted to an analysis of pre-clinical and clinical experiments on photodynamic action of HeNe laser radiation in aggregate with a cation thiazinium dye Methylene Blue (MB) on a mix of pathogenic and conditionally pathogenic aerobic bacteria being activators of pyoinflammatory diseases of oral cavity. Concentration of photosensitizes at which there is no own bactericidal influence on dying microflora, and parameters of influence at which the efficiency of irradiated microflora defeat reaches 99 % are determined.

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