Table 2 Material Property Designations of the Finite Element Model
From: Investigation into the biomechanics of lumbar spine micro-dynamic pedicle screw
Component | E (MPa) | ʋ | Cross-Sectional Area(mm) |
|---|---|---|---|
Cortical | 12,000 | 0.3 | – |
Cancellous | 100 | 0.2 | – |
Posterior | 3500 | 0.25 | – |
Fibrosus | 450 | 0.3 | – |
Pulposus | 1 | 0.499 | – |
Endplate | 23.8 | 0.4 | – |
Ligaments | – | – | – |
ALL | 7.8(ε < 0.12) | 0.45 | 67.3 |
20(ε > 0.12) | |||
PLL | 10(ε < 0.11) | 0.45 | 20 |
20(ε > 0.11) | |||
FL | 15(ε < 0.062) | 0.45 | 40 |
19.5(ε > 0.062) | |||
SSL | 8(ε < 0.20) | 0.45 | 30 |
15(ε > 0.20) | |||
ISL | 10(ε < 0.14) | 0.45 | 40 |
11.6(ε > 0.14) | |||
ITL | 10(ε < 0.18) | 0.45 | 18 |
58.7(ε > 0.18) | |||
Implants | – | – | – |
Titanium | 110,000 | 0.33 | – |