Table 4. Maximum von Mises equivalent stress values of the screws and the bone around the screw under compression load.
| Length of screw (mm) | 60 | 75 | 90 | ||||
|---|---|---|---|---|---|---|---|
| Angle (Degree) | 15 | 30 | 15 | 30 | 15 | 30 | |
| S2AI screw | von-Mises Stress (MPa) |
94.70 | 87.60 | 73.30 | 73.71 | 72.85 | 70.39 |
| Percent of change (%) | 0.00 | -7.50 | -22.60 | -22.16 | -23.07 | -25.67 | |
|
Bone (Ilium) |
von-Mises Stress (MPa) |
52.46 | 52.75 | 40.06 | 48.28 | 35.24 | 35.65 |
| Percent of change (%) | 0.00 | 0.57 | -23.64 | -7.97 | -32.83 | -32.04 | |
|
Bone (Sacrum) |
von-Mises Stress (MPa) |
49.50 | 50.65 | 47.91 | 49.20 | 48.28 | 49.12 |
| Percent of change (%) | 0.00 | 2.32 | -3.21 | -0.61 | -2.46 | -0.68 | |
| Iliac screw | von-Mises Stress (MPa) |
110.63 | 156.40 | 147.36 | |||
| Percent of change (%) | 0.00 | 41.37 | 33.20 | ||||
|
Bone (Ilium) |
von-Mises Stress (MPa) |
46.00 | 45.77 | 45.44 | |||
| Percent of change (%) | 0.00 | -0.50 | -1.22 | ||||