|
Cortical bone
|
Isotropic, elastic hex elements (C3D8)
|
10,000
|
0.3
|
|
Cancellous bone
|
Isotropic, elastic hex elements (C3D8)
|
450
|
0.25
|
|
Posterior bone
|
Isotropic, elastic hex elements (C3D8)
|
3500
|
0.25
|
|
Annulus ground substance
|
Isotropic, elastic hex elements (C3D8)
|
4.2
|
0.25
|
|
Annulus fibers
|
REBAR elements
|
-
|
0.45
|
|
Nucleus pulposus
|
Incompressible fluid, cavity elements
|
1
|
0.49
|
|
Anterior Longitudinal Ligament (ALL)
|
Tension-only, Truss elements (T3D2)
|
15 (<12%*) 30 (>12%*)
|
0.3
|
|
Posterior Longitudinal Ligament (PLL)
|
Tension-only, Truss elements (T3D2)
|
10 (<12%*) 20 (>12%*)
|
0.3
|
|
Ligamentum Flavum (LF)
|
Tension-only, Truss elements (T3D2)
|
7 (<12%*) 30 (>12%*)
|
0.3
|
|
Interspinous Ligament (ISL)
|
Tension-only, Truss elements (T3D2)
|
5(<25%*) 10 (>25%*)
|
0.3
|
|
Capsular Ligaments (CAP)
|
Tension-only, Truss elements (T3D2)
|
15 (20-40%*) 30 (>40%*)
|
0.3
|
|
T itanium (InterPlate)
|
Isotropic, elastic Tetrahedral elements (C3D4)
|
1,130,000
|
0.34
|
|
Cortical Bone Graft
|
Isotropic, elastic Tetrahedral elements (C3D4)
|
10,000
|
0.3
|
|
PEEK (InterPlate)
|
Isotropic, elastic Tetrahedral elements (C3D4)
|
3400
|
0.4
|
