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Adhesion testing of dentin bonding agents: a review
D H Pashley1, H Sano, B Ciucchi
1Department of Oral Biology, School of Dentistry, Medical College of Georgia, Augusta, USA.
Summary
Recent advances in dentin bonding agents have improved bond strengths to 20-30 MPa. New microtensile testing methods are needed to accurately measure interfacial bond strength due to cohesive failures in dentin.
Area of Science:
- Dental materials science
- Biomaterials engineering
- Adhesion science
Background:
- Dentin bonding agents are crucial for dental restorations.
- Previous research focused on improving bond strength to dentin.
- Standardization of testing variables is an ongoing challenge.
Purpose of the Study:
- To review adhesion testing methodologies for dentin bonding agents.
- To discuss recent advancements in dentin bonding systems.
- To introduce and evaluate novel testing methods for high bond strengths.
Main Methods:
- Review of literature on dentin bonding, including etching, priming, bonding, storage, and testing variables.
- Discussion of recent reports on standardizing testing parameters.
- Description of a new microtensile testing method.
Main Results:
- Modern dentin bonding systems achieve bond strengths of 20-30 MPa.
- High bond strengths often result in cohesive failure within the dentin substrate.
- This failure mode limits the assessment of interfacial bond strength.
Conclusions:
- Significant progress has been made in dentin bonding over the last decade.
- New testing methods, such as microtensile testing, are required to overcome limitations of current techniques.
- Future research will likely focus on refining these new methods and further enhancing dentin bonding performance.