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Table 1 Material properties of elements used in the model

From: A unique modular implant system enhances load sharing in anterior cervical interbody fusion: a finite element study

Element group name Element type Young’s Modulus (MPa) Poisson's ratio
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
  1. *Strain Values.