Table 5. Maximum von Mises equivalent stress values of the screws and the bone around the screw under compression and flexion loads.
| Length of screw (mm) | 60 | 75 | 90 | ||||
|---|---|---|---|---|---|---|---|
| Angle (Degree) | 15 | 30 | 15 | 30 | 15 | 30 | |
| S2AI screw | von-Mises Stress (MPa) |
109.75 | 101.16 | 91.30 | 92.52 | 90.10 | 86.70 |
| Percent of change (%) | 0.00 | -7.83 | -16.81 | -15.70 | -17.90 | -21.00 | |
|
Bone (Ilium) |
von-Mises Stress (MPa) |
60.82 | 61.94 | 43.21 | 52.09 | 43.03 | 42.89 |
| Percent of change (%) | 0.00 | 1.84 | -28.95 | -14.35 | -29.25 | -29.48 | |
|
Bone (Sacrum) |
von-Mises Stress (MPa) |
62.39 | 63.12 | 61.00 | 63.21 | 61.53 | 62.70 |
| Percent of change (%) | 0.00 | 1.17 | -2.23 | 1.31 | -2.22 | 0.50 | |
| Iliac screw | von-Mises Stress (MPa) |
123.5 | 172.28 | 163.76 | |||
| Percent of change (%) | 0.00 | 39.50 | 32.60 | ||||
|
Bone (Ilium) |
von-Mises Stress (MPa) |
51.22 | 50.71 | 50.46 | |||
| Percent of change (%) | 0.00 | -1.00 | -1.48 | ||||