Table 2.
Quantitative evaluation of biofilm reduction. Mean ± standard deviation, median, and minimum and maximum values of biofilm elimination after root canal irrigation for each group.
| Group | Apical | Middle | Coronal | |||
|---|---|---|---|---|---|---|
| Mean ± SD | Median (min-max) |
Mean ± SD | Median (min-max) |
Mean ± SD | Median (min-max) |
|
| 1 | 1.00 ± 0.0 | 1 (1-1) | 1.08 ± 0.3 | 1 (1-2) | 2.08 ± 1.1 | 2 (1-4) |
| 2 | 1.25 ± 0.5 | 1 (1-2) | 1.42 ± 0.7 | 1 (1-3) | 1.42 ± 0.7 | 1 (1-3) |
| 3 | 2.92 ± 0.7 | 3 (2-4) | 2.58 ± 0.8 | 3 (1-4) | 2.17 ± 0.6 | 2 (1-3) |
| 4 | 1.67 ± 0.7 | 2 (1-3) | 1.50 ± 0.7 | 1 (1-3) | 1.08 ± 0.3 | 1 (1-2) |
| 5 | 1.50 ± 0.5 | 1.5 (1-2) | 1.67 ± 0.5 | 2 (1-2) | 1.92 ± 0.8 | 2 (1-3) |
| 6 | 1.58 ± 0.5 | 2 (1-2) | 1.75 ± 0.6 | 2 (1-3) | 1.83 ± 0.7 | 2 (1-3) |
| 7 | 2.17 ± 0.6 | 2 (1-3) | 2.50 ± 0.9 | 3 (1-4) | 2.00 ± 1.0 | 2 (1-4) |
| 8 | 2.17 ± 0.4 | 2 (2-3) | 2.00 ± 0.4 | 2 (1-3) | 1.92 ± 0.7 | 2 (1-3) |
| 9 | 3.70 ± 0.5 | 4 (3-4) | 3.50 ± 0.5 | 3.5 (3-4) | 3.40 ± 0.7 | 3.5 (2-4) |
Groups 1 and 2: saline and 1% NaOCl with apical position of PIPS, respectively; Groups 3 and 4: saline and 1% NaOCl with coronal position of PIPS, respectively; Groups 5 and 6: Nd:YAG laser after conventional irrigation with saline and with 1% NaOCl, respectively; Groups 7 and 8: conventional irrigation with 1% NaOCl and with 6% NaOCl, respectively, negative control; and Group 9: saline solution, positive control).