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A novel composite-to-composite adhesive bond mechanism
Naotake Akimoto1, Tominori Sakamoto, Yuya Kubota
1Department of Operative Dentistry, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Japan. naotakeaki@mac.com
Dental Materials Journal
|July 23, 2011
Summary
Resin composite adhesion can be enhanced by self-etching primers, which utilize a chelation reaction with alkaline metal ions found in certain dental materials. This method improves bond strength based on composite filler composition.
Area of Science:
- Dental Materials Science
- Adhesion Science
- Surface Chemistry
Background:
- Resin composites are widely used in dentistry.
- Understanding adhesion mechanisms between resin composites is crucial for clinical longevity.
- Surface filler composition can influence inter-material bonding.
Purpose of the Study:
- To investigate if elemental ion chelation facilitates adhesion between resin composites.
- To compare the efficacy of conventional silane coupling versus self-etching primer treatments.
- To analyze the role of surface elemental composition in composite-to-composite bonding.
Main Methods:
- Surface elemental analysis using X-ray fluorescence (XRF) on four resin composites.
- Shear bond strength testing to evaluate composite-to-composite adhesion.
- Comparison of conventional silane coupling treatment with self-etching primer treatment.
Main Results:
- Strontium and Barium (alkaline earth metal ions) were detected on Beautifil II and Clearfil AP-X surfaces.
- Self-etching primer treatment yielded significantly higher shear bond strength for Beautifil II and Clearfil AP-X.
- Estelite Σ Quick and Solare showed lower bond strengths with self-etching primer treatment.
Conclusions:
- Self-etching primer treatment promotes resin composite adhesion by leveraging chelation reactions.
- The effectiveness of self-etching primers is dependent on the composite's filler composition, specifically the presence of alkaline metal ions.
- Chelation adhesion between acidic monomers and incorporated metal ions is a key factor in enhanced composite bonding.
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