Table 2. Buckling resistance, maximum screw-in force, and clockwise torque generated during instrumentation of the nickel-titanium retreatment instruments, and percentage of residual filling material.
| Characteristic | DR1 | DR2 | HyFlex Remover | Mtwo R25/05 |
|---|---|---|---|---|
| Buckling resistance (gf) | 365.0 ± 56.05a | 950.22 ± 27.75c | 712.81 ± 25.64b | |
| Maximum clockwise torque (N·cm) | 0.310 ± 0.084a | 0.534 ± 0.097b | 0.948 ± 0.153d | 0.696 ± 0.113c |
| Maximum upward force (gf) | 20.77 ± 9.68a | 92.49 ± 16.58a | 364.71 ± 89.45b | 539.78 ± 132.20c |
| Percentage of residual filling material (%) | 10.58 ± 8.03 | 12.43 ± 7.60 | 7.60 ± 4.45 | |
Values are presented as mean ± standard deviation.
Different lowercase letters in each row indicate significant differences between groups (p < 0.05).