. 2023 Apr 10;9(4):e15396. doi: 10.1016/j.heliyon.2023.e15396

Table 2.

Comparison of the inactivation effect between untreated and aPDT-treated biofilms.

Group	Output power	LED illumination time (min)	TBO incubation time (min)	inactivation
Group	(mW)	LED illumination time (min)	TBO incubation time (min)	effect (%)
Negative control	0	0	0	1.43 ± 0.67
aPDT	500	1	1	92.41 ± 3.84^a
			5	92.93 ± 3.61^a
			10	92.97 ± 3.87^a
		2	1	99.82 ± 0.29^a
			5	99.95 ± 0.07^a
			10	99.54 ± 0.64^a
	750	1	1	99.75 ± 0.20^a
			5	99.92 ± 0.09^a
			10	99.83 ± 0.25^a
		2	1	99.74 ± 0.23^a
			5	99.63 ± 0.30^a
			10	99.86 ± 0.14^a
P value				<0.01

TBO, toluidine blue O; aPDT, antimicrobial photodynamic therapy; LED, light-emitting diode; a, P < 0.05 vs. negative control.