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Contact angle of dentin bonding agents on the dentin surface
1Department of Operative Dentistry, School of Dentistry, Showa University, Tokyo, Japan.
Dental Materials Journal
|June 1, 1996
Summary
Priming dentin surfaces significantly enhances bonding agent wettability by increasing surface free energy. This improves the physical interaction between dental materials and dentin for better dental restorations.
Area of Science:
- Biomaterials Science
- Dental Materials
- Surface Chemistry
Background:
- Dentin bonding procedures are crucial for dental restoration longevity.
- Understanding dentin surface properties is key to optimizing bonding agent performance.
- The smear layer and surface energy influence the interaction between dentin and bonding agents.
Purpose of the Study:
- To evaluate physical changes in dentin surface characteristics during bonding.
- To determine the surface free energy of primed dentin surfaces.
- To assess the wettability of dentin bonding agents on treated dentin.
Main Methods:
- Contact angle measurements of standard liquids to determine surface free energy.
- Contact angle measurements of a commercial dual-cured dentin bonding agent.
- Evaluation of dentin surfaces before and after treatment with experimental primers.
Main Results:
- Commercial bonding agent did not form a hemispherical shape on ground dentin, suggesting penetration into the smear layer.
- Contact angles could not be measured on primed dentin surfaces due to rapid spreading of the bonding agent.
- Priming increased surface free energy and improved bonding agent wettability on dentin.
Conclusions:
- Priming dentin surfaces after smear layer removal enhances surface energy.
- Improved surface energy leads to superior wettability of dentin bonding agents.
- Optimized wettability is critical for effective dentin bonding and durable restorations.