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Mean stiffness values for the pure compression and torsion test modes in the conditions tested
| Mode | Intact | Discectomy | Implant |
|---|---|---|---|
| Pure comp (N/mm) | 1485 ± 229 | 1364 ± 235 | 1362 ± 241 |
| Left torsion (Nmm/degree) | 4056 ± 600 | 3610 ± 425 | 3848 ± 316 |
| Right torsion (Nmm/degree) | 3696 ± 493 | 3259 ± 243 | 3518 ± 278 |
