[Retracted] Spinal Biomechanical Modelling in the Process of Lumbar Intervertebral Disc Herniation in Middle-Aged and Elderly

Table 1

Unit attributes of the spine biomechanical model.

Organizational material	Density (10^−6 kg/mm^3)	Young’s modulus (MPa)	Poisson’s ratio
Posterior longitudinal ligament	1.12	9.41	0.41
Anterior longitudinal ligament	1.20	10.91	0.39
Annulus	1.32	5.71	0.49
Cancellous bone	1.81	292	0.27
Compact bone	1.23	14320	0.41