Suryani Dyah Astuti, NIDN. 0008046902 and Andi Hamim Zaidan, NIDN. 0022048302 and Ernie Maduratna Setiawatie, NIDN. 0012026603 and Suhariningsih, NIDN. 0027065203 (2015) Chlorophyll mediated photodynamic inactivation of blue laser on Streptococcus mutans. In: Proceedings of 5th International Conference and Workshop on Basic and Applied Sciences (ICOWOBAS 2015). AIP Publishing, Surabaya, pp. 1-9. ISBN 0094243X

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Abstract

Abstract. Photodynamic inactivation is an inactivation method in microbial pathogens that utilize light and photosensitizer. This study was conducted to investigate photodynamic inactivation effects of low intensity laser exposure with various dose energy on Streptococcus mutans bacteria. The photodynamic inactivation was achieved with the addition of chlorophyll as photosensitizers. To determine the survival percentage of Streptococcus mutans bacteria after laser exposure, the total plate count method was used. For this study, the wavelength of the laser is 405 nm and variables of energy doses are 1.44, 2.87, 4.31, 5.74, 7.18, and 8.61 in J/cm 2. The results show that exposure to laser with energy dose of 7.18 J/cm 2 has the best photodynamicinactivation with a decrease of 78% in Streptococcus

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