Biomedical Engineering Reference
In-Depth Information
a
b
Enamel
Plastic
5.0
0 min
1 mi
n
3 mi
n
5 mi
n
10 m
in
15
min
30 m
in
4.0
3.0
2.0
1.0
0.0
0
10
20
30
2 µm
Erosion time/min
0.5 mm
Surface profile
Variation of erosion depth as function of time
Fig. 4.16
Surface profi le and erosion depth of enamel after different times of erosion [
49
]
50
Ca
P
40
30
20
10
0
0
10
20
30
Erosion time/min
Fig. 4.17
Variation in the calcium/phosphate ion content of enamel surface with erosion time [
49
]
400
300
200
100
0
10
20
30
Erosion time/min
Fig. 4.18
Variation in the microhardness of enamel surface with erosion times [
49
]
