抄録
The bactericidal effects of Nd: YAG laser by using a reaction mediator of TiO2 were studied. Two strains of bacteria, Streptococcus mutans ATCC 25175 and Streptococcus soblinus ATCC 33478 were used for this experiment.
Bacterial cell suspensions of each strain were divided into four groups: such as cell suspension alone, cell suspension with TiO2, and cell suspension with or without TiO2, which were irradiated with the Nd: YAG laser at 900 mJ-10pps, total energy of 1, 500 J under control of the temperature of the reaction mixture.
After those treatments, the viable cell count was estimated in each group.
The bactericidal effects of the Nd: YAG laser with TiO2 showed a significant reduction of viable cells of S. mutans and S. soblinus after laser irradiation with total energy of 1, 500 J. It might be possible that the bactericidal action revealed shock wave effects by Nd: YAG laser irradiation with TiO2 as a reaction mediator.
