Invited communication. Adhesion between living tissue and plastics. I. Adhesion of epoxy and polyurethane resins to dentin and enamel
✍ Scribed by Lee, Henry L.
- Publisher
- John Wiley and Sons
- Year
- 1969
- Tongue
- English
- Weight
- 924 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0021-9304
No coin nor oath required. For personal study only.
✦ Synopsis
In previous paper^,^^^ we have discussed the synthesis of epoxy resins suitable
In this paper we have outlined our research for dental and orthopedic adhesives. on two other critical aspects: surface preparation and test methods.
Modern theories of adhesion niay be suinrnarized by the following statement: "If a liquid can be caused to wet a substrate, and then caused to convert from the liquid phase to the solid phase with low enough shrinkage so that the adsorption forces between the liquid and substrate are not broken or disrupted, then the solified liquid will bond to the substrate."
Although this is a simple sounding rule of thumb, it is full of pitfalls. The siniple sounding problem of defining the term "wetting" introduces one to the complex science of thermodynamics of surfaces involving surface tension, critical surface tension, surface free energy, contact angle (dynamic and static, advancing and receding), cohesive energy density, spreading pressure, solubility, gas adsorption, etc.