Biomedical Engineering Reference
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Fig. 10 Safety factor for 343.35 N acting at the head of right proximal femur of male patients at
28 and 24
Table 1
Comparison of results
Model 1 (17-year-
male) (%)
Model 2 (32-year-
male) (%)
Model 3 (40-year-
male) (%)
Total deformation
13.81
14.285
2.455
Equivalent Von Mises
stress
14.047
13.04
2.357
Maximum principal
stress
13.615
13.959
3.195
computational studies have evaluated the intact whole femur's overall stiffness,
strength, cyclic loading, and high-energy impact loading under various loading
regimes, such as axial compression, lateral bending, and torsional loading, which
simulate either normal activity of daily living or injury mechanisms. The devel-
opment of subject-specific FE models using CT data is a powerful tool to non-
invasively investigate clinical applications such as fracture risk, prosthesis design,
and bone remodeling. On applying the same half-body weight on the head of each
right proximal femur of 17, 32, and 40-year-male patients models under study at
different angles of 24.4 and 28, the following conclusion is drawn:
1. Same half-body weight acting at variable angles on the femur head results in
increase in total deformation with increase in the inclination angle for all
models of different age groups.
2. Same half-body weight acting at variable angles on the femur head results in
increase in equivalent Von Mises stress and maximum principal stress with
increase in the inclination angle for all models of different age groups.
3. The safety factor is the highest in the 32-year-male, then the 17-year-male, and
least in the 40-year-male for the same half-body weight.
4. Safety factor is also decreasing with increase in inclination angle under phys-
iologic loading.
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