Table 2.

Biomechanical and Compositional Data for Samples Included in the Study (n = 20 Endplates)

	Mean	SD	CV (%)	Range
Equilibrium properties
A (MPa)	0.24	0.25	104.2	0.02–0.92
B	26.8	13.7	51.1	10.9–67.4
Tensile modulus, E0% (MPa)	5.9	5.7	96.6	0.5–21.8
Viscoelastic properties
Energy dissipation, C (MPa)	0.035	0.016	45.7	0.015–0.065
Short relaxation constant, τ1 (s)	5.7E–5	7.8E–5	135.8	8.7E–8–2.7E–4
Long relaxation constant, τ2 (s)	362	204	56.4	129–766
Biochemical composition
Water content (%)	39.7	11.0	27.7	22.1–62.4
GAG content (μg/mg dry wt)	99.8	31.7	31.8	43.7–184.8
Collagen content (μg/mg dry wt)	558.5	146.9	26.3	329.0–886.9