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19 May 1999 Effects of 635- and 670-nm laser irradiation on Candida albicans: study in vitro
Antonio Luiz Barbosa Pinheiro, Elizabeth A. C. Ponzi, Maria da Paz C. Silva, Alessandro L. B. Vieira
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Proceedings Volume 3593, Lasers in Dentistry V; (1999) https://doi.org/10.1117/12.348326
Event: BiOS '99 International Biomedical Optics Symposium, 1999, San Jose, CA, United States
Abstract
This study aimed to assess the effect of the use of lasers (635; 670nm) on Candida albicans In Vitro. Cultures of microorganisms were irradiated with and without artificial illumination and non-irradiated cultures acted as controls. A single irradiation with the dose of 1.5J/cm2 was used and measurements of DO and NC assessed the effects of the irradiation. The measurements were carried out with 24 (T1), 48 (T2) and 72 (T3)after irradiation. The results showed a significant difference between groups with relation to the DO on the presence of illumination. There are significant differences between the three groups at T1 and T3 related to the NC. In all situations significant differences were observed highest values occurred when illumination was not used. Cultures irradiated with the laser 635 nm grow faster than those irradiated with the laser 670 nm. Measurements of DO/NC were sensitive to detect changes in Candida albicans cultures irradiated or not. It is concluded that a single irradiation of Candida albicans cultures with laser of 670 and 635 nm results in proliferation of the microorganisms In Vitro.
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Antonio Luiz Barbosa Pinheiro, Elizabeth A. C. Ponzi, Maria da Paz C. Silva, and Alessandro L. B. Vieira "Effects of 635- and 670-nm laser irradiation on Candida albicans: study in vitro", Proc. SPIE 3593, Lasers in Dentistry V, (19 May 1999); https://doi.org/10.1117/12.348326
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KEYWORDS
Microorganisms
Laser dentistry
Absorbance
In vitro testing
Control systems
Laser irradiation
Semiconductor lasers
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