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The dentinal surface: its influence on dentinal adhesion. Part III
J D Eick1, S J Robinson, R P Chappell
1Department of Oral Biology, University of Missouri-Kansas City, School of Dentistry 64108.
Quintessence International (Berlin, Germany : 1985)
|August 1, 1993
Summary
Category III dentinal adhesive systems demonstrate high shear bond strength, often exceeding 17 MPa. This strength can lead to cohesive dentin failure, indicating effective bonding and surface interaction.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Adhesive Dentistry
Background:
- Category III dentinal adhesive systems are defined by shear bond strength values near or exceeding 17 MPa.
- Understanding their performance is crucial for clinical success in restorative dentistry.
Purpose of the Study:
- To compare the performance of contemporary Category III dentinal adhesive systems using advanced microscopy techniques.
- To contrast these systems with commercial examples and those exhibiting characteristics of Categories I and II.
Main Methods:
- Utilized transmission and scanning electron microscopy (TEM and SEM) for detailed ultrastructural analysis.
- Evaluated commercial dentinal adhesive systems including Superbond, Scotchbond Multi-Purpose, and Prisma Universal Bond 3.
- Assessed shear bond strength values and failure modes.
Main Results:
- Category III systems achieved high shear bond strength, frequently causing cohesive failure within the dentin substrate.
- Effective wetting and penetration of the prepared dentinal surface were observed.
- Collagen fibers at the adhesive-dentin interface remained structurally intact post-testing.
Conclusions:
- High shear bond strength in Category III systems is linked to superior surface interaction and preservation of dentin structure.
- These findings support the clinical efficacy of advanced dentinal adhesive systems for durable restorations.