The effect of smear layer removal on E. faecalis leakage and bond strength of four resin-based root canal sealers

Table 2 Proportion of leaked samples and the number of days the samples resisted the bacterial leakage, expressed as mean, range, and standard deviation (SD). Four group codes, see Table 1

Material/smear	P	Mean	Range	SD	D
AH-s	15/15	29.4	23-35	1.0	b
AH-ns	15/15	36.8	30-41	1.1	a
ER-s	15/15	11.8	9-16	0.7	e
ER-ns	15/15	8.7	6-13	0.5	d
RS-s	15/15	24.7	20-37	1.1	b
RS-ns	15/15	15.1	11-20	0.8	c
MTAF-s	15/15	8.9	6-13	0.7	d
MTAF-ns	15/15	13.3	9-18	0.8	c
Positive control	5/5	2	2	0
Negative control	0/5	50	50	0

AH AHPlus, ER EndoRez, RS RealSeal/Resilon, MTAF MTA Fill Apex, s smear layer in situ
ns smear layer removed with EDTA, P proportion of samples leaked, Mean mean time of leakage days, Range range of leakage days, SD Standard deviation of the leakage days, D Log-rank test (P< 0.05): experimental groups with different letter are significantly different from each other

ISSN: 1472-6831