Spine Model for Disc Replacement - Computational Biomechanics of the Musculoskeletal System - page 218

table 17.1
material Properties of the Cervical Segment Component and artificial device in the
Finite element model

Component element type young's modulus e (mPa) Poisson's ratio V

Cortical shell Shell 12,000 0.29

Cancellous bone Tetrahedral 100 0.25

Endplate Shell 12,000 0.29

Annulus Hexahedral 3.4 0.40

Nucleus Hexahedral 1 0.49

Annulus fiber Truss 450 0.45

CoCrMo Tetrahedral 220,000 0.32

UHMWPE Tetrahedral 1,000 0.49

Titanium Hexahedral 114,000 0.35

Allograft Hexahedral 100 0.25

(a) (b)

FIgure 17.6 (See color insert.) Finite element model of intact C3-C7: (a) anterior view and (b) lateral view.

17.2.2 m odel of t otal d iSc r eplacement
The ProDisc-C (Synthes Spine USA Products LLC, Westchester, Pennsylvania) artificial disc was
selected for the TDR model. An appropriate prosthesis size was chosen by analyzing the CT data
and the developed intact cervical model. The three-dimensional model (IGES format) of the pros-
thesis was developed using CAD (computer-aided design) engineering software Pro/Engineer, and