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Table 9 The percentage change of the maximum Von Mises stress on the intervertebral discs among three surgical models

From: Biomechanical evaluation of three surgical scenarios of posterior lumbar interbody fusion by finite element analysis

  

PCT

PAIB

PCP

Extension

L1-L2

-27.92%

-26.11%

-27.92%

L2-L3

-34.31%

-31.34%

-34.20%

L3-L4

-27.70%

-4.80%

-27.60%

L5-S1

-35.70%

-5.65%

-35.70%

Flexion

L1-L2

-3.65%

-3.48%

-3.60%

L2-L3

-20.79%

-19.68%

-20.59%

L3-L4

-27.74%

-8.34%

-27.66%

L5-S1

-41.67%

-11.27%

-41.41%

Lateral bending

L1-L2

-7.89%

-6.60%

-7.72%

L2-L3

-9.15%

-7.76%

-9.03%

L3-L4

-17.07%

-2.70%

-17.28%

L5-S1

-62.97%

-62.39%

-63.14%

Torsion

L1-L2

13.50%

13.45%

13.49%

 

L2-L3

6.64%

7.62%

6.67%

 

L3-L4

8.18%

15.61%

8.36%

 

L5-S1

60.89%

61.58%

62.72%

  1. (Percentage change = (Data of surgical model - Data of intact model)/Data of intact model × 100%.)