## 3 Results and Discussion
### OWHTO Geometric Planning Optimization

Table 6: The values of F and p, respectively, for the regression equations. \begin{table}
\begin{tabular}{l c c c} \hline \hline
**Level** & **V1** & **V2** & **V3** & **V4** \\ \hline
1 & \(-\)42.22 & \(-\)45.13 & \(-\)42.40 & \(-\)42.46 \\
2 & \(-\)42.94 & \(-\)40.04 & \(-\)42.76 & \(-\)42.70 \\ Delta & 0.72 & 5.10 & 0.36 & 0.24 \\ Rank & 2 & 1 & 3 & 4 \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Response for signal to noise ratios (smaller is better). Postoperative Behavior of the Tibia Plaque Ensemble TomoFix by Osteosynthesis Taking into Account the Overcorrection Degree of the Mechanical Axis of the Leg  
The main purpose of the OWHTO is to eliminate the axial deviation that occurs at the level of the mechanical axis of the tongue, but, for a favorable postoperative evolution and a very good recovery, overcorrections are made regarding the position of this axis. In this sense, there are experimental researches or clinical studies [18; 19; 20; 21; 22; 23; 24; 25; 26] that recommend different values or sets of values for these overcorrections. The results we obtained in this study due to the computer-assisted approach allow a continuous assessment of the values of stress and strain that occur in the bone and the TomoFix plate for the entire range of overcorrection, from the middle joint to a maximum value of 25%, towards the medial part of the tibia. Table 9 shows the maximum total deformations and the maximum equivalent stresses for the main five positions of the corrected mechanical axis (0%, 5%, 12.5%, 20%, 25%). Figures 13-15 show the distribution of total deformations (a) of equivalent stress states in the bone (b), and in the flat TomoFix (c) for three distinct positions: 0% overcorrection (Figure 13), Fujisawa Point 12.5% and the maximum overcorrection of 25%. Figures 16-18 show the variations in the three response functions studied depending on the degree of overcorrection of the mechanical axis. Analyzing the presented results, a first observation would be that there is a substantial change in the values of deformities for the equivalent stress in the plate and a smaller change in the equivalent stress in the tibia. This first aspect reveals that the fixation of the TomoFix plate is a stable one because an almost constant equivalent stress can be noticed in the tibia bone regardless of the degree of overcorrection (Figure 17). The variation is a fairly small linear one between a maximum value of 115.56 MPa for 0% (i.e., without overcorrection) and a minimum of 111.82 MPa for a maximum overcorrection of 25%. The results thus confirm the research in [43], which highlights the superiority and stability of TomoFix flat fixation relative to other fastening systems. Figure 13: Distributions of the total deformation, equivalent stress in tibia and equivalent stress in the plate—0%. \begin{table}
\begin{tabular}{l c c c c c} \hline \hline Modification of the Position of the Mechanical Axis, \% & 0 & 5 & 12.5 & 20 & 25 \\ \hline Total Deformation, mm & 0.409 & 0.344 & 0.452 & 0.627 & 0.772 \\ \hline Equivalent Stress in bone, MPa & 115.56 & 114.83 & 113.7 & 112.57 & 111.82 \\ \hline Equivalent Stress in the plate, MPa & 201.47 & 182.07 & 152.85 & 123.62 & 111.51 \\ \hline \hline \end{tabular}
\end{table} 
Table 9: Maximum values for deformations, bone stress equivalent, plaque stress equivalent obtained after FEM analysis. Figure 16: Variation in the total deformation related to the overcorrection positions. Figure 14: Distributions of the total deformation, equivalent stress in tibia and equivalent stress in the plate—12.5%. Figure 15: Distributions of the total deformation, equivalent stress in tibia and equivalent stress in the plate—25%. In the case of the TomoFix equivalent stresses, there is a more consistent, nonlinear variation of about 100 MPa but with the same tendency to decrease from 0% to 25% (Figure 18).