Table 2.
Centering ratio (mm) at 3, 5, and 7 mm according to group analyzed by micro-CT imaging
| WaveOne Gold | XP Shaper | |||
|---|---|---|---|---|
| Level | Mean ± SD | Median (range) | Mean ± SD | Median (range) |
| 7 mm | 0.33 ± 0.13A | 0.36 (0.14–0.53) | 0.52 ± 0.21B | 0.57 (0.17–0.86) |
| 5 mm | 0.41 ± 0.17 | 0.45 (0.17–0.65) | 0.52 ± 0.22 | 0.59 (0.12–0.79) |
| 3 mm | 0.56 ± 0.32 | 0.69 (0.10–0.97) | 0.64 ± 0.21 | 0.73 (0.29–0.90) |
SD standard deviation
Values closer to 0 indicates instrument’s poor ability to maintain the central axis of the root canal
Values equal to 1 indicated perfect centering ability of the instrument
No statistically significant difference was found within groups (one-way ANOVA, P > 0.05)
Different letters in the same row indicate a statistically significant difference between groups (unpaired t test, P < 0.05)