Skip to main content

Table 4 Stresses along the screw channels in bone

From: Comparison of theoretical fixation stability of three devices employed in medial opening wedge high tibial osteotomy: a finite element analysis

Fixation Screw channel (from proximal) Surface of the channel maxσx(compression stress) minσx(tensile stress)
First generation Puddu plate 1 Upper 2.16  
Lower   2.07
2 Upper   2.57
  Lower   4.6
Second generation Puddu plate 1 Upper 1.50  
Lower   6.04
2 Upper   1.47
  Lower   5.23
TomoFix with bone graft 1 Upper   0.34
Lower   0.41
2 Upper 0.78  
Lower   2.58
3 Upper   0.28
Lower   1.20
4 Upper   0.55
Lower   1.08
5 Upper   0.34
Lower   0.87
6 Upper   0.25
  Lower   0.48
TomoFix without bone graft 1 Upper   0.53
Lower   0.58
2 Upper 0.78  
Lower   7.15
3 Upper   2.20
Lower   4.70
4 Upper   1.24
Lower   2.10
5 Upper   0.46
Lower   0.98
6 Upper   0.35
  Lower   0.76
  1. Note: the values exceeding the maximum allowable threshold for the stresses on the screw are in bold.