Biomedical Engineering Reference
In-Depth Information
sensitivity [TAY 02, PER 03, UNE 04, PEU 05, AKI 07, VAN 07,
PEU 10].
Figure 10.4.
Side view of hybrid layer after cryofracturation (C: composite, H: hybrid
layer, T: resin tags inside dentinal tubules and D: dentin). Image has been digitally
altered to enhance readability
While classically described as a pure mechanical phenomenon,
recent studies have shown that bonding to mineralized dental tissues
also implies a physicochemical mechanism. It has been shown that
reactive functions of some monomers have the ability to interact with
the mineral phase of dental tissues, forming primary chemical liaisons.
This phenomenon adds to micromechanical retention, improving
overall adhesion [YOS 00, YOS 04].
10.4. A word on dental bonding system composition
With very few exceptions, current dental adhesive systems are all
based on methacrylic monomers that allow for
in-situ
polymerization
through the use of a photo-initiating system and subsequent
copolymerization with the restorative material. A summarized
