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Final irrigating solutions
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Short-term
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Long-term
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Paired comparison
**
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|---|
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CFUs × 10
3
of
E. faecalis
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Grown samples at 60 days
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Before instrumentation
*
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After instrumentation
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Number and % of grown samples
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Minimum
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Maximum
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Group 1: 2.5% NaOCl
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88 ± 69.07
|
0
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12
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100
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3
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20
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a
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Group 2: 7% MA
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106 ± 135.6
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0
|
11
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91.7
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5
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>60
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b
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Group 3: 7% MA + 0.2% CTR
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119 ± 156.1
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0
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7
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58.3
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5
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>60
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b,c
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Group 4: 7% MA + 2% CHX
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119.4 ± 154.5
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0
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5
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41.7
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24
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>60
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c,d
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Group 5: 7% MA + 0.2% CTR +2% CHX
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93.1 ± 84.1
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0
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4
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33.3
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9
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>60
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c,d
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Control group: 0.9% Saline solution+
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88 ± 69.07
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0.004 ± 0.007
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-
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-
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-
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-
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- Number of grownsamples at 60 days. Median of the day of regrowth. n = 12 per group.
- NaOCl: sodium hypochlorite. MA: maleic acid; CTR: cetrimide; CHX: chlorhexidine.
-
+No long-term analysis was performed because all samples grew on first day.
- *Before instrumentation there was the same E. faecalis level in all groups determined by an ANOVA test previously subjecting data to a Poisson normalization transformation: √(basal data + 3/8) (p = 0.978).
- **The same letter shows differences that were not statistically significant determined by the Log-Rank test (statistical significance level was set at p< 0.05). p values of pair by pair comparisons: group 1 vs group 2: p = 0.015, group 1 vs group 3: p = 0.010, group 1 vs group 4: p< 0.001, group 1 vs group 5, p< 0.001, group 2 vs group 3: p = 0.247, group 2 vs group 4: p = 0.005, group 2 vs group 5: p = 0.005, group 3 vs group 4: p = 0.193, group 3 vs group 5: p = 0.157, group 4 vs group 5: p = 0.928.
