Biomedical Engineering Reference
In-Depth Information
Fig. 4.28
Variation in the
mean friction coeffi cient as a
function of the distance from
the DEJ [
56
]
0.12
Eroded
Control
0.09
0.06
0.03
0.00
2.00
1.50
1.00
0.50
0.00
Distance from DEJ/mm
Fig. 4.29
Wear volume of
the enamel at different depths
[
56
]
150
Control
Eroded
100
50
0
Outer
Intermediate
Interior
the surface of enamel and then break the integrity of the enamel structure, causing
the increase and fl uctuation in the friction coeffi cient and decreasing the wear resis-
tance [
49
]. And the infl uence on the friction and wear behavior increased with the
erosive lesion extent of enamel surface. The dissolution of enamel rods became
increasingly severe from the outer to the interior enamel (Fig.
4.24
), and the eroded
surface of the interior enamel was most uneven (Fig.
4.25
). In addition, considering
that the more severe the erosive lesion of the enamel surface was, the thicker the
softened layer beneath the eroded surface was [
46
], it could be inferred that the
subsurface of the interior enamel suffered more from acid attack than that of outer
enamel. Therefore, a more signifi cant infl uence of erosion on the friction and wear
behavior was observed in the interior enamel than in the outer enamel.
