Biomedical Engineering Reference
In-Depth Information
a
b
B
A
B
A
0
2
4
6
8
10
12
0
2
4
6
8
10
12
[
μ
m]
[
μ
m]
360.0
360.0
240.0
240.0
120.0
120.0
0.0
0.0
0.0
2.5
5.0
7.5
10.0
0.0
2.5
5.0
7.5
10.0
Length of AA/µm
Length of BB/µm
Fig. 4.32
Two-dimensional AFM micrograph of enamel surface and profi le of enamel rod [
63
]:
(
a
) at the eroded surface; (
b
) at the remineralized surface
Remineralized
Eroded
Original
20
25
30
35
40
45
50
55
60
2
θ
/°
Fig. 4.33
XRD spectra of enamel surface [
63
]
The XRD curves of the original, eroded, and remineralized surfaces of enamel
are shown in Fig.
4.33
. Table
4.5
lists the characteristic peaks. The deposits on the
remineralized surface were mainly composed of hydroxyapatite crystals (HA), the
major inorganic component of natural enamel, but the crystal growth was different
from that of the original surface. The crystals on the original surface of enamel had
