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Bacterial culturing before and after irradiation. (a) Er, Cr:YSGG laser, (a) 0.3 mm thickness; (b) 0.5 mm thickness; and (c) 1 mm thickness. (b) 445 nm diode laser: (a) 0.3 mm thickness; (b) 0.5 mm thickness; and (c) 1 mm thickness. (c) Er, Cr:YSGG and 445 nm diode lasers, (a) 0.3 mm thickness; (b) 0.5 mm thickness; and (c) 1 mm thickness.
