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Table 1 Material properties of the lumbosacral FE model and spinal implants

From: Biomechanical feasibility of semi-rigid stabilization and semi-rigid lumbar interbody fusion: a finite element study

Component Young’s Modulus (MPa) Poissons Ratio
Annulus Fiber
Inner Laminate: Inner Layer 360 0.30
Inner Laminate: Middle Layer 385 0.30
Inner Laminate: Outer Layer 420 0.30
Outer Laminate: Inner Layer 440 0.30
Outer Laminate: Middle Layer 495 0.30
Outer Laminate: Outer Layer 550 0.30
Annulus Ground Substance 4.2 0.45
Nucleus Pulposus 1 0.49
Cancellous Bone 100 0.20
Cortical Bone 12,000 0.30
Posterior Bony Elements 3500 0.25
Endplate 12,000 0.30
ALL/PLL/LF/ISL/SSL 20/20/20/10/10 0.25
DIAM core 20 0.45
DIAM Truss 5000 0.20
Graft Bone 100 0.20
PEEK 3600 0.25
Titanium screw/rod 110,000 0.30