Table 2 Equivalent stress of various cages and bone grafts under all circumstances
Equivalent Stress | ||||||
|---|---|---|---|---|---|---|
| Â | Ti | ZK60 | Optimized | ZK60 vs Ti | Optimized vs ZK60 | Optimized vs Ti |
Cage (MPa) | ||||||
 Static | 1.69 | 1.42 | 1.17 | −15.57% | −18.12% | −30.87% |
 Flexion | 1.72 | 1.41 | 1.12 | −18.03% | −20.52% | −34.85% |
 Extension | 1.76 | 1.52 | 1.25 | −13.51% | −17.89% | −28.98% |
 Left lateral bending | 1.75 | 1.46 | 1.16 | −16.51% | −20.15% | −33.34% |
 Right lateral bending | 1.76 | 1.48 | 1.21 | −15.87% | −18.55% | −31.48% |
 Left axial rotation | 1.69 | 1.41 | 1.12 | −16.15% | −20.52% | −33.35% |
 Right axial rotation | 1.69 | 1.43 | 1.17 | −15.70% | −18.27% | −31.10% |
Bone graft (KPa) | ||||||
 Static | 37.99 | 48.77 | 69.03 | 28.37% | 41.55% | 81.70% |
 Flexion | 38.42 | 47.91 | 67.24 | 24.69% | 40.36% | 75.02% |
 Extension | 39.10 | 51.26 | 74.79 | 31.07% | 45.91% | 91.25% |
 Left lateral bending | 39.00 | 49.67 | 70.45 | 27.38% | 50.56% | 91.77% |
 Right lateral bending | 38.66 | 49.48 | 70.00 | 27.99% | 42.39% | 82.24% |
 Left axial rotation | 37.95 | 47.87 | 67.12 | 26.13% | 40.21% | 76.85% |
 Right axial rotation | 38.14 | 48.93 | 69.33 | 28.29% | 41.69% | 81.79% |