Biomedical Engineering Reference
In-Depth Information
Figure 9.72
Calcium-phosphates deposited from HA + HCl electrolyte on
lat (a) and porous Ti (b) [33].
Figure 9.73
Calcium phosphates deposited from Ca(NO
3
)
2
+ (NH
4
)
2
HPO
4
+ HCl electrolyte; different magniication on (a) and (b) [33].
Fig. 9.74 shows EDS analysis of the calcium-phosphate
deposited on lat (a) and porous (b) surface with using the 0.1M
HCl + 0.005M HA electrolyte. For the porous sample, the deposited
layer has larger Ca/P ratio corresponding to HA (1.68). Porous
sample shows higher oxygen, calcium and phosphorus content,
with respect to lat surface. The surface composition should results
in good corrosion resistance as well as osseointegration. The trace
of silicon is a contamination introduced from the silicon rubber
used for the seal of the electrochemical cell. Comparable results
(presented on Fig. 9.72) of HA morphology (Fig. 9.75, 9.76) was
obtained by Xie
et al
. [107] and Wei
et al
. [100], respectively.
