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Table 6 The von Mises stress of the structures in different lengths of titanium plates

From: Biomechanical effect of different plate-to-disc distance on surgical and adjacent segment in anterior cervical discectomy and fusion - a finite element analysis

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
  1. PDD Plate-to-disc distance
  2. * P<0.05:Compared with titanium plates of 5 mm PDD
  3. # P<0.05:Compared with titanium plates of 10 mm PDD