Table 3.
The biomechanical in vitro test result of the yielding load and stiffness of our designed CS-type cage and the ISO 23089 standard acceptance criteria under compression, compression-shear and torsion
| Test model | Comparative parameter | ISO 23089 | CS-type cage | Safety factor (CS-type/ISO23089) |
|---|---|---|---|---|
| Static axial compression | Yield load (N) | 6317 | 134643 | 21.3 |
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| Stiffness (N/mm) | 5914 | 70080 | 11.8 | |
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| Static compression-shear | Yield load (N) | 1996 | 23904 | 12.0 |
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| Stiffness (N/mm) | 1435 | 19841 | 13.8 | |
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| Static torsion | Yield load (N-m) | 7 | 19.8 | 2.8 |
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| Stiffness (N-mm/degree) | 1 | 3.5 | 3.5 | |