Biomedical Engineering Reference
In-Depth Information
(A1)
(A2)
(B)
FIGURE 7.16
SEM micrographs of the fracture area in microshear bond strength test. (A1) The area for adhesive containing
0.2 wt% PAA-grafted nanoclay representing good penetration of adhesive into dentin tubules. (A2) shows the
tubules in higher magnification. (B) The area for adhesive containing 5 wt% PAA grafted nanoclay. Lack of
complete penetration is clear (C, composite; A, adhesive; D, dentin).
7.5
Ketac nanoprimer
Recently, 3M ESPE introduced a new product, a nanofilled RMGI cement utilizing a Ketac nano-
primer for optimum bonding to enamel and dentin. Ketac nanoprimer is one-component water-
based acidic primer with a pH
3. Due to its high pH, removal of smear layer was not performed
leading to lower bond strength, and the remnant of the smear layer was observed on scanning
