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Table 2 Comparison of ROMs at different intervertebral levels

From: Biomechanical comparison of noncontiguous cervical disc arthroplasty and noncontiguous cervical discectomy and fusion in the treatment of noncontinuous cervical degenerative disc disease: a finite element analysis

Motion (°)

Segments

Models

P values

Intact

Arthroplasty

Fusion

Intact vs arthroplasty

Intact vs fusion

Arthroplasty vs fusion

Flexion

 

C2/3

4.10 ± 0.75

4.22 ± 0.88

7.67 ± 1.17

0.791

< 0.001

< 0.001

 

C3/4

5.22 ± 1.09

6.27 ± 0.95

0.94 ± 0.14

0.075

< 0.001

< 0.001

 

C4/5

5.74 ± 1.08

7.03 ± 0.94

12.72 ± 1.33

0.032

< 0.001

< 0.001

 

C5/6

5.70 ± 1.11

7.23 ± 0.88

1.08 ± 0.26

0.013

< 0.001

< 0.001

 

C6/7

4.39 ± 0.94

5.29 ± 0.75

8.31 ± 1.07

0.067

< 0.001

< 0.001

Extension

 

C2/3

3.24 ± 0.79

2.88 ± 0.77

5.03 ± 1.13

0.398

0.004

0.001

 

C3/4

4.23 ± 1.03

4.79 ± 0.72

0.87 ± 0.23

0.256

< 0.001

< 0.001

 

C4/5

4.72 ± 0.83

5.23 ± 1.06

10.45 ± 1.60

0.338

< 0.001

< 0.001

 

C5/6

4.65 ± 1.01

4.74 ± 1.09

0.77 ± 0.18

0.866

< 0.001

< 0.001

 

C6/7

4.04 ± 1.03

3.83 ± 0.88

5.88 ± 1.11

0.688

0.006

0.002

Lateral bending

 

C2/3

5.15 ± 0.85

2.71 ± 0.69

5.75 ± 1.10

< 0.001

0.277

< 0.001

 

C3/4

4.84 ± 1.15

5.16 ± 0.94

0.86 ± 0.11

0.582

< 0.001

< 0.001

 

C4/5

4.73 ± 1.29

6.31 ± 1.00

10.99 ± 1.38

0.971

< 0.001

< 0.001

 

C5/6

3.42 ± 0.77

4.70 ± 0.95

0.66 ± 0.08

0.014

< 0.001

< 0.001

 

C6/7

2.63 ± 0.58

2.58 ± 0.74

4.33 ± 0.93

0.902

0.002

0.002

Axial rotation

 

C2/3

2.20 ± 0.83

2.01 ± 0.34

4.19 ± 0.38

0.574

< 0.001

< 0.001

 

C3/4

2.97 ± 0.79

3.18 ± 0.48

1.03 ± 0.45

0.562

< 0.001

< 0.001

 

C4/5

3.73 ± 0.67

3.99 ± 0.43

5.45 ± 0.57

0.407

< 0.001

< 0.001

 

C5/6

3.14 ± 0.62

3.71 ± 0.43

0.96 ± 0.40

0.065

< 0.001

< 0.001

 

C6/7

2.20 ± 0.93

1.95 ± 0.45

3.34 ± 0.63

0.532

0.019

0.002

  1. ROM range of motion