Biomedical Engineering – From Theory to Applications

Orthopaedic Modular Implants Based on Shape Memory Alloys
(a) b) c)
Fig. 8. The stress map for the second case(a), the loading force in the third case (b) and the
stress map obtained for the third case (c)
Metacarpi: The virtual model of the bone was subjected to:
- traction with a force evenly distributed on the head of the metacarpal bone surface,
while the basis is the fixation surface. The stresses diagram can be observed in Figure 9a
and the displacements diagram in Figure 9b.
- torsion with a moment applied at the metacarpal head, the basis of the bone being
fixed. The tension diagram is given in Figure 9c and Figure 9d.
a) b) c) d)
Fig. 9. The stresses diagram (a), the displacements diagram (b) for traction and stresses
diagram for torsion solicitation of the metacarpi bone (c and d)
Clavicle:Two loading cases have been taken into consideration:
1. compression with an evenly distributed force equal with 4 N/mm 2 applied on the
extreme surface of the clavicle while the basis is the fixation surface (results in Figure
10a and Figure 10b).
2. flexion given by 400 N of force distributed on the lateral surface of the clavicle (results
in Fig.10c and Fig.10d)
a) b) c) d)
Fig. 10. The normal tension map for clavicle (a), the linear deformations for the clavicle bone
in the first case (b), and tension map (c) and deformation map (d) in the second case
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