Table 1 Results of the 1000 cycles tests for both screws
2.5 mm pitch | 5 mm pitch | p | |
|---|---|---|---|
Number of valid samples | 9 | 9 | |
Maximum insertion torque (N m) | 1.74 ± 0.47 | 1.86 ± 0.34 | |
Stiffness at 100th cycle (N/mm) | 256.4 ± 50.7 | 259.4 ± 69.4 | .757 |
Stiffness at 1000th cycle (N/mm) | 280.3 ± 56.4 | 275.2 ± 65.0 | .965 |
Displacement at 100th cycle (mm) | 1.35 ± 1.15 | 1.49 ± 2.21 | .508 |
Displacement at 1000th cycle (mm) | 6.25 ± 5.66 | 5.13 ± 4.56 | .757 |
Yield load (N) | 482.2 ± 120.2 | 495.9 ± 131.3 | .508 |
Pull-out stiffness (N/mm) | 277.8 ± 71.7 | 244.5 ± 64.6 | .200 |
Ultimate failure load (N) | 656.6 ± 178.7 | 648.9 ± 169.7 | .965 |