Biomechanical role of osteoporosis affects the incidence of adjacent segment disease after percutaneous transforaminal endoscopic discectomy

Table 1 The material properties of the current finite element models

Components	Young’s modulus (osteoporosis)	Poisson’s ratio	Cross-sectional area (mm²)
Cortical	12000 (8070)	0.3	/
Cancellous	100 (34)	0.2	/
Posterior elements	3500 (2345)	0.25	/
Endplate	1000 (670)	0.4	/
Cartilage	10	0.4	/
Capsular	26	0.3	67.5
ALL	20	0.3	60
PLL	70	0.3	21
LF	50	0.3	60
ITL	50	0.3	10
ISL	28	0.3	40
SSL	28	0.3	30

Material properties of the osteoporosis model are shown in brackets
ALL anterior longitudinal ligament, PLL posterior longitudinal ligament, LF ligamentum flavum, ISL interspinous ligament, SSL supraspinal ligament, ITL intertransverse ligament

ISSN: 1749-799X