Biomechanics following skip-level cervical disc arthroplasty versus skip-level cervical discectomy and fusion: a finite element-based study

Table 1 Material properties and mesh types of the cervical finite element model

	Yong modulus (MPa)	Poisson ration	Element type	Cross section (mm²)
Cortical bone	12,000	0.29	C3D4	–
Cancellous bone	200	0.29	C3D4	–
Annulus fibrosus substance	4.2	0.49	C3D4	–
Annulus fibers	450	0.45	T3D2	–
Nucleus pulposus	1	0.45	C3D4	–
Facet joint cartilage	10.4	0.4	C3D4	–
ALL	30	0.3	T3D2	6.1
PLL	20	0.3	T3D2	5.4
LF	1.5	0.3	T3D2	50.1
IL	1.5	0.3	T3D2	13.1
SL	1.5	0.3	T3D2	13.1
CL	10	0.3	T3D2	46.6
Titanium	110,000	0.3	C3D4	–
PEEK	3600	0.3	C3D4	–

ALL, anterior longitudinal ligament; CL, capsular ligament; IL, interspinous ligament; LF, ligamentum flavum; PLL, posterior longitudinal ligament; SL, supraspinous ligament; C3D4, tetrahedron; T3D2, truss, tension only

ISSN: 1471-2474