Biomedical Engineering Reference
In-Depth Information
(A)
(B)
Etched
Peritubular
dentin
Intertubular
dentin
(C)
(D)
NaOCl 100 s
NaOCl 200 s
FIGURE 7.20
AFM images showing open dentinal collagen network after acid etching followed by NaOCl treatment.
From Ref.
[46]
—needs permission.
(A)
(B)
(C)
(D)
(E)
(F)
(G)
(H)
FIGURE 7.21
AFM images of acid-etched dentinal collagen showing dehydration collapse of collagen network by time for
superficial dentin (A
D) and deep dentin (E
H).
El Feninat et al.
[47]
used AFM to study the air drying of etched dentin. Air drying resulted in
the collapse of the collagen network but not in the denaturation of collagen fibrils. This study indi-
cated that collapse and denaturation are separate phenomena. It further showed that water loss
occurred rapidly and disrupted the native conformation of the collagen network. This could have
adverse effects on adhesion. It was shown that it is possible to obtain images of demineralized
