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Table 1 ROM of four FE models at all motion segments

From: Biomechanical evaluation of a new pedicle screw-based posterior dynamic stabilization device (Awesome Rod System) - a finite element analysis

Motion

Model

L1-L2 (Degree)

L2-L3 (Degree)

L3-L4 (Degree)

L4-L5 (Degree)

Moment (Nm)

L1-L5 stiffness (Nm/Degree)

Flexion

INT

3.63 (100%)

3.74 (100%)

3.71 (100%)

5.22 (100%)

3.8 (100%)

0.23 (100%)

 

AWE

4.85 (134%)

4.79 (128%)

4.72 (127%)

1.84 (35%)

8.4 (221%)

0.52 (226%)

 

FUS

4.85 (134%)

4.86 (130%)

5.8 (156%)

0.76 (15%)

8.4 (221%)

0.52 (226%)

 

AWEFUS

6.85 (189%)

6.93 (185%)

1.62 (44%)

0.89 (17%)

13.65 (359%)

0.84 (365%)

Extension

INT

2.62 (100%)

2.23 (100%)

2.07 (100%)

2.01 (100%)

6.4 (100%)

0.72 (100%)

 

AWE

3.18 (121%)

2.73 (122%)

2.7 (130%)

0.29 (14%)

8.05 (126%)

0.9 (125%)

 

FUS

3.08 (118%)

2.63 (118%)

2.57 (124%)

0.55 (27%)

7.7 (120%)

0.87 (121%)

 

AWEFUS

4.14 (158%)

3.56 (160%)

0.5 (24%)

0.74 (37%)

11.55 (180%)

1.29 (179%)

Lateral Bending

INT

7.11 (100%)

5.2 (100%)

5.07 (100%)

5.01 (100%)

8.2 (100%)

0.37 (100%)

 

AWE

9.42 (132%)

6.18 (119%)

5.73 (113%)

1.18 (24%)

11.9 (145%)

0.53 (143%)

 

FUS

9.44 (133%)

6.21 (119%)

5.79 (114%)

0.94 (19%)

11.9 (145%)

0.53 (143%)

 

AWEFUS

12.5 (176%)

8.03 (154%)

1.22 (24%)

0.56 (11%)

15.75 (192%)

0.71 (192%)

Torsion

INT

5.58 (100%)

2.9 (100%)

3.4 (100%)

4.74 (100%)

9.7 (100%)

0.58 (100%)

 

AWE

7.86 (141%)

3.14 (108%)

3.43 (101%)

2.18 (46%)

15.05 (155%)

0.91 (157%)

 

FUS

8.08 (145%)

3.21 (111%)

3.5 (103%)

1.84 (39%)

15.4 (159%)

0.93 (160%)

 

AWEFUS

9.5 (170%)

3.35 (116%)

1.79 (53%)

2.03 (43%)

17.85 (184%)

1.07 (184%)

  1. The percentages indicate the ROM of all models normalized by the ROM of INT.