von Mises stress (MPa)
|
PDD = 0 mm
|
PDD = 5 mm
|
PDD = 10 mm
|
F
|
P
|
η2
|
---|
Flexion
|
C4/C5 disc
|
1.417 ± 0.297
|
1.411 ± 0.257
|
1.422 ± 0.271
|
0.406
|
0.671
|
0.029
|
C6/C7 disc
|
1.483 ± 0.036
|
1.476 ± 0.045
|
1.455 ± 0.030
|
1.495
|
0.242
|
0.100
|
Bone graft
|
0.255 ± 0.040 * #
|
0.307 ± 0.025 #
|
0.400 ± 0.031
|
49.897
|
< 0.001
|
0.787
|
Titanium plate
|
57.886 ± 3.374 * #
|
48.363 ± 4.237 #
|
36.822 ± 1.049
|
109.670
|
< 0.001
|
0.890
|
Screw
|
32.983 ± 1.238 * #
|
42.075 ± 3.569 #
|
58.018 ± 3.083
|
202.663
|
< 0.001
|
0.938
|
Extension
|
C4/C5 disc
|
1.337 ± 0.027
|
1.333 ± 0.019
|
1.346 ± 0.032
|
0.619
|
0.546
|
0.044
|
C6/C7 disc
|
1.425 ± 0.027
|
1.419 ± 0.016
|
1.413 ± 0.018
|
0.751
|
0.482
|
0.053
|
Bone graft
|
1.527 ± 0.051 * #
|
1.668 ± 0.042 #
|
1.812 ± 0.053
|
84.109
|
< 0.001
|
0.862
|
Titanium plate
|
58.069 ± 6.173 * #
|
41.552 ± 3.822 #
|
24.791 ± 1.740
|
148.985
|
< 0.001
|
0.917
|
Screw
|
34.820 ± 1.386 * #
|
58.166 ± 3.206 #
|
95.603 ± 2.204
|
1653.432
|
< 0.001
|
0.992
|
Bending
|
C4/C5 disc
|
1.382 ± 0.038
|
1.426 ± 0.119
|
1.388 ± 0.041
|
0.957
|
0.397
|
0.066
|
C6/C7 disc
|
1.402 ± 0.030
|
1.415 ± 0.032
|
1.398 ± 0.020
|
0.960
|
0.395
|
0.066
|
Bone graft
|
1.522 ± 0.084 * #
|
1.868 ± 0.057 #
|
2.308 ± 0.055
|
349.902
|
< 0.001
|
0.963
|
Titanium plate
|
94.691 ± 1.859 * #
|
83.956 ± 2.769 #
|
73.790 ± 1.708
|
233.352
|
< 0.001
|
0.945
|
Screw
|
55.388 ± 1.090 * #
|
60.705 ± 1.258 #
|
66.406 ± 0.647
|
285.569
|
< 0.001
|
0.955
|
Rotation
|
C4/C5 disc
|
1.384 ± 0.047
|
1.378 ± 0.036
|
1.387 ± 0.038
|
0.112
|
0.895
|
0.008
|
C6/C7 disc
|
1.351 ± 0.170
|
1.292 ± 0.170
|
1.224 ± 0.080
|
1.912
|
0.167
|
0.124
|
Bone graft
|
1.620 ± 0.026 * #
|
1.714 ± 0.053 #
|
1.945 ± 0.041
|
161.710
|
< 0.001
|
0.923
|
Titanium plate
|
68.463 ± 2.529 * #
|
62.311 ± 2.526 #
|
57.824 ± 0.929
|
62.751
|
< 0.001
|
0.823
|
Screw
|
56.617 ± 1.467 * #
|
64.038 ± 1.663 #
|
75.025 ± 2.727
|
208.241
|
< 0.001
|
0.939
|
- PDD Plate-to-disc distance
- * P<0.05:Compared with titanium plates of 5 mm PDD
- # P<0.05:Compared with titanium plates of 10 mm PDD