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Table 4 The comparison of L4/5 segment activity ranges among the four spine models: N, H, H1, H2

From: Biomechanical evaluation of percutaneous cement discoplasty by finite element analysis

L4-L5 Motion

Model

Simulation value (radian)

Relative ratio (combined)

FE (x)

N

0.22649

100% (Normal)

H

0.21524

95.03%

H1

0.14050

62.03%

H2

0.14268

63.0%

LRR (z)

N

0.10839

100% (Normal)

H

0.09513

87.8%

H1

0.05082

46.9%

H2

0.04919

45.4%

LRB(y)

N

0.14095

100% (Normal)

H

0.12596

89.4%

H1

0.07048

50.0%

H2

0.06904

49%

  1. FE Flexion and Extension, LRB Left and Right Bending, LRR Left and Right Rotation