Table 1.

Mean and Standard deviation of colony forming unit (CFU) in each group.

	Conventional	PIPS	EDDY	Endoultra	-p-Value
Control groups	1900000 ± 0.000	1700000 ± 0.000	1500000 ± 0.000	1500000 ± 0.000	1.000
After irrigation	2110 ± 1015.93 b	27.40 ± 30.15 a	81.30 ± 85.68 a	44.40 ± 67.12 a	<0.001
-p-value	<0.001	<0.001	<0.001	<0.001
Percentage of decrease	99.889 % ± 0.053 a	99.998% ± 0.002 b	99.994% ± 0.006 b	99.997% ± 0.004 b	<0.001

(^a, ^b Different letters indicate the presence of significant difference between irrigation groups).