Biomedical Engineering Reference
In-Depth Information
Density
(Avg : 75%)
+1 . 000e
+
00
+9 . 003e
−
01
+8 . 005e
−
01
+7 . 008e
−
01
+6 . 010e
−
01
+5 . 013e
−
01
+4 . 015e
−
01
+3 . 020e
−
5.89%
−
3.78%
+2 . 018e
−
01
+1 . 023e
01
−
−
01
+2 . 506e
−
03
−
5.89%
−
3.78%
+
4.77%
+
9.02%
+
6.94%
3
2
1
(a)
(b)
(c)
−
10.15%
−
4.92%
−
0.84%
−
1.67%
+
2.23%
+
5.75%
+
3.42%
(d)
(e)
Figure 2.14
Femur anterior view. Bone density distribution
postoperatively (a), after bone remodeling (b). Changes in
bone mass for CrCo prosthesis (c). Bone density distribu-
tion after bone remodeling (d). Changes in bone mass for Ti
prosthesis (e).
Owing to the trabecular reorientation, it is possible to see in Figure 2.16(a)
(diaphysis) a vertical alignment in the lateral cortex, as expected, and an alignment
of 45
◦
in the region next to the prosthesis, in order to support shear forces from
the bonded interface. Figure 2.16(b) shows an orientation that is not well-defined
in the metaphysis because of the complex and changing stress-strain distribution
of the trabeculae.
