Table 7. Maximum von Mises equivalent stress values of the screws and the bone around the screw under compression and rotation loads.
| Length of screw (mm) | 60 | 75 | 90 | ||||
|---|---|---|---|---|---|---|---|
| Angle (Degree) | 15 | 30 | 15 | 30 | 15 | 30 | |
| S2AI screw | von-Mises Stress (MPa) |
101.11 | 94.28 | 79.21 | 80.99 | 78.12 | 76.45 |
| Percent of change (%) | 0.00 | -6.76 | -21.65 | -19.90 | -22.74 | -24.39 | |
|
Bone (Ilium) |
von-Mises Stress (MPa) |
53.27 | 54.44 | 40.50 | 48.82 | 36.52 | 37.08 |
| Percent of change (%) | 0.00 | 2.20 | -23.97 | -8.35 | -31.44 | -30.39 | |
|
Bone (Sacrum) |
von-Mises Stress (MPa) |
50.91 | 52.02 | 49.33 | 50.91 | 49.75 | 50.53 |
| Percent of change (%) | 0.00 | 2.18 | -3.10 | 0.00 | -2.28 | -0.75 | |
| Iliac screw | von-Mises Stress (MPa) |
131.21 | 178.29 | 167.49 | |||
| Percent of change (%) | 0.00 | 35.88 | 27.65 | ||||
|
Bone (Ilium) |
von-Mises Stress (MPa) |
49.31 | 49.03 | 48.77 | |||
| Percent of change (%) | 0.00 | -0.57 | -1.10 | ||||