Table 2 von Mises stress results at each structure in three different models.

From: Comparing zero-profile and conventional cage and plate in anterior cervical discectomy and fusion using finite-element modeling

Component

von Mises stress on each model (Mpa)

(% of von Mises stress with reference)

Reference

CCP

ZPSC

C4–C5 Endplate upper

3.946

2.081 (52.74%)

5.031 (241.76%)

C4–C5 Endplate lower

2.505

1.736 (69.30%)

2.759 (158.93%)

C4–C5 Annulus fibrosus

1.844

4.400 (238.61%)

1.936 (44.00%)

C4–C5 Nucleus pulposus

1.844

0.275 (2116.54%)

0.019 (6.98%)

C6–C7 Endplate upper

1.744

1.731 (99.25%)

3.401 (196.48%)

C6–C7 Endplate lower

1.646

1.422 (86.39%)

2.645 (186.01%)

C6–C7 Annulus fibrosus

1.154

3.920 (339.69%)

2.039 (52.02%)

C6–C7 Nucleus pulposus

0.005

0.179 (3580.00%)

0.015 (8.38%)

C5 Cortical bone

9.337

22.525 (241.24%)

36.830 (163.51%)

C6 Cortical bone

8.228

17.925 (217.85%)

14.931 (83.30%)

C5 Cancellous bone

0.060

0.183 (305.00%)

1.264 (690.71%)

C6 Cancellous bone

0.112

0.305 (272.32%)

0.167 (54.75%)

Cage

 

103.610

47.135

Screw

 

69.074

74.297