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Table 4 Comparison of average pressures in intervertebral discs

From: Biomechanical effects of hybrid constructions in the treatment of noncontinuous cervical spondylopathy: a finite element analysis

Pressure (MPa)

Segments

Models

P values

Intact

Group 1

Group 2

Intact versus Group 1

Intact versus Group 2

Group 1 versus Group 2

Flexion

 

C2/3

0.25 ± 0.06

0.38 ± 0.10

0.30 ± 0.08

0.001*

0.078

0.038*

 

C4/5

0.29 ± 0.06

0.49 ± 0.12

0.46 ± 0.12

 < 0.001*

0.001*

0.586

 

C6/7

0.26 ± 0.05

0.35 ± 0.09

0.49 ± 0.12

0.007*

 < 0.001*

0.005*

Extension

 

C2/3

0.29 ± 0.06

0.40 ± 0.10

0.26 ± 0.07

0.005*

0.346

0.001*

 

C4/5

0.29 ± 0.06

0.51 ± 0.13

0.49 ± 0.12

 < 0.001*

 < 0.001*

0.683

 

C6/7

0.26 ± 0.05

0.34 ± 0.09

0.48 ± 0.12

0.020*

 < 0.001*

0.005*

Lateral bending

 

C2/3

0.40 ± 0.07

0.64 ± 0.16

0.46 ± 0.12

 < 0.001*

0.139

0.007*

 

C4/5

0.43 ± 0.08

0.74 ± 0.19

0.74 ± 0.19

 < 0.001*

 < 0.001*

0.956

 

C6/7

0.40 ± 0.07

0.53 ± 0.13

0.61 ± 0.15

0.001*

0.001*

0.260

Axial rotation

 

C2/3

0.43 ± 0.08

0.69 ± 0.17

0.50 ± 0.13

 < 0.001*

0.165

0.006*

 

C4/5

0.46 ± 0.08

0.78 ± 0.20

0.80 ± 0.20

 < 0.001*

 < 0.001*

0.884

 

C6/7

0.43 ± 0.08

0.55 ± 0.14

0.66 ± 0.17

0.023*

 < 0.001*

0.108

  1. Group 1, upper fusion and lower arthroplasty; Group 2, upper arthroplasty and lower fusion
  2. *Statistically significant difference