Biomedical Engineering Reference
In-Depth Information
0.009
E
= 200 GPa
E
= 150 GPa
E
= 100 GPa
0.006
0.003
0.000
-0.003
-0.006
0
100
200
300
400
t
(day)
FIGURE 5.22
Effect of pin stiffness on surface bone remodeling.
0.20
0.15
0.10
0.05
0
50
100
150
200
t
(day)
FIGURE 5.23
Effect of electromagnetic field on internal bone remodeling.
E
= 200 GPa, the porosity increases significantly as time progresses, whereas
the bone porosity remains nearly constant over time when
E
= 150 GPa or
below. Figure 5.22 also shows that the inner radius increases quickly with
time
t
when
E
= 200 GPa, but the inner radius
a
remains constant for
E
= 150
Gpa, and
a
decreases slowly with time
t
for
E
= 100 GPa.
5.6.3.3 Effect of Electromagnetic Field on Bone Remodeling
Assuming that φ = 0, 5, 10, 15 V; ψ = 1 A;
f
e
= 2 Hz; δ/a = 5%; and
E
= 100
Gpa, Figure 5.23 records variation of porosity with time
t
under the loading
