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Water sorption/solubility of self-etching dentin bonding agents
Shuichi Ito1, Tomohiro Hoshino, Masahiro Iijima
1Health Sciences University of Hokkaido, Division of Cariology and Endodontology, Department of Oral Rehabilitation, School of Dentistry, 1757 Tobetsu, Hokkaido 0610293, Japan. shu@hoku-iryo-u.ac.jp
Summary
Single-step self-etching adhesives exhibit higher water sorption and solubility compared to two-step systems, potentially impacting their long-term performance in dental applications.
Area of Science:
- Dental Materials Science
- Polymer Chemistry
- Adhesive Dentistry
Background:
- Self-etching adhesives are crucial in dental restorations.
- Understanding their water sorption and solubility is vital for durability.
- Previous research indicates potential differences between single-step and multi-step systems.
Purpose of the Study:
- To compare water sorption/solubility, percent conversion, and microtensile bond strength.
- To evaluate three single-step self-etching adhesives against a two-step system.
Main Methods:
- Gravimetric analysis for solvent evaporation and water sorption/solubility.
- Fourier Transform Infrared (FTIR) spectroscopy for percent conversion.
- Microtensile bond strength testing after 24-hour bonding.
Main Results:
- Single-step adhesives showed significant weight loss post-solvent evaporation, unlike Fluorobond II.
- Water sorption and solubility increased over time in water for all resins.
- Fluorobond II (two-step) exhibited the lowest water sorption and solubility.
Conclusions:
- Single-bottle self-etching adhesives demonstrate greater water sorption and solubility than two-step systems.
- These properties suggest potentially inferior long-term functionality for single-step adhesives.
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