Comparison of Different Irrigants in the Removal of Endotoxins and Cultivable Microorganisms from Infected Root Canals

Table 1

Distribution of the median colony-forming unit (CFU/mL) and median percentage of bacterial load reduction found at all different sampling times (S1, S2, and S3).

Groups	Microorganisms	Baseline (S1)		After instrumentation (S2)			After 7 days (S3)
		CFU/mL	Positive culture	CFU/mL	Negative culture	Median % valued; reduction; (S1-S2)	CFU/mL	Negative culture	Median % valued; reduction; (S1–S3)
GI; NaOCl; + surfactant	E. faecalis	2.0 × 10^7	10/10	0	9/10	100 (50.33–100)	0	10/10	100
	C. albicans	2.55 × 10^5	10/10	0	9/10	100 (48.53–100)	0	10/10	100
	E. coli	3.12 × 10^5	10/10	0	10/10	100	0	10/10	100
GII; 2% CHX solution	E. faecalis	9.25 × 10^7	10/10	0	10/10	100	0	9/10	100 (62.91–100)
	C. albicans	3.06 × 10^5	10/10	0	10/10	100	0	10/10	100
	E. coli	3.36 × 10^5	10/10	0	10/10	100	0	10/10	100
GIII; 2.5%; NaOCl	E. faecalis	2.15 × 10^7	10/10	0	10/10	100	1.0 × 10^2	7/10	72.6 (55.58–100)
	C. albicans	1.10 × 10^5	10/10	0	10/10	100	0	10/10	100
	E. coli	3.19 × 10^5	10/10	0	10/10	100	0	10/10	100
GIV; Control group	E. faecalis	1.84 × 10^7	10/10	5.0 × 10^1	0/10	33 (29.62–42.69)	1.0 × 10^3	0/10	30.88 (26.47–36.13)
	C. albicans	1.06 × 10^5	10/10	8.96 × 10^4	1/10	80.63 (26.83–100)	1.40 × 10^5	1/10	78.10 (29–100)
	E. coli	3.52 × 10^5	10/10	4.48 × 10^2	0/10	36.39 (21.59–42.69)	4.32 × 10^4	0/10	38.53 (19.51–47.93)

Statistical differences ().