Biomedical Engineering Reference
In-Depth Information
(A)
1
ยต
m
(B)
200 nm
FIGURE 7.25
Field Emission Scanning Electron Microscope (FESEM) micrographs of nanocapsules (A and B). FESEM
micrographs indicate that the TEGDMA nanocapsules are spherical with smooth and condense surface.
direction for the improvement of the bonding durability. To allow the healing precursors in dental
adhesives to reach the submicron spaces created by acid etching within dentin, the need for nano-
encapsulation is needed. Ouyang et al.
[79]
prepared, characterized, and incorporated polyurethane
nanocapsules encapsulated with the core material TEGDMA for use as a major component in a
self-healing bonding resin (
Figure 7.25
). The incorporation of nanoencapsulated monomers in den-
tal adhesives showed enhancement of bond strength and expected to improve durability of resin
tooth bonding (
Figure 7.26
).
7.9.7
High-speed AFM
The future advancement in research tools will improve our understanding of adhesion and will
further clarify the associated obstacles. One of the most promising tools is the high-speed AFM
(HS-AFM), which is becoming a reference tool for the study of dynamic biological processes.
