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Table 5 ROM and torsional rigidity in different motions of this study

From: Topping-off surgery vs posterior lumbar interbody fusion for degenerative lumbar disease: a finite element analysis

Motion state

Vertebral

ROM (°)

Average ROM of L3 and L4 (°)

Rotational stiffness (N.m/°)

Average rotational stiffness of L3 and L4 (N.m/°)

Anteflexion 10(N*m)

L3

4.8739

3.4137

2.051745

3.585381

L4

1.9535

5.119017

Rear protraction 10(N*m)

L3

5.1141

3.88215

1.955378

2.864339

L4

2.6502

3.7733

Lateral bending 10(N*m)

L3

3.65885

3.037475

3.65885

3.450752

L4

2.4161

2.4161

Axial rotation 10(N*m)

L3

4.68015

3.50455

4.68015

3.312286

L4

2.32895

2.32895