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Adhesive bond strengths using self- and light-cured composites
Ricardo Walter1, Georgia V Macedo, Gustavo M S Oliveira
1Department of Operative Dentistry, School of Dentistry, University of North Carolina at Chapel Hill, NC, USA. rick_walter@dentistry.unc.edu
The Journal of Contemporary Dental Practice
|December 19, 2009
Summary
Some dental adhesives fail to bond effectively with self-cured resin composites, potentially leading to restoration failure. This incompatibility impacts the microtensile bond strength (microTBS) of dental materials.
Area of Science:
- Dental Materials Science
- Adhesive Dentistry
- Biomaterials Engineering
Background:
- Dental restorations rely on strong adhesion between tooth structure and restorative materials.
- The development of various adhesive systems and resin composites aims to improve bond strength and longevity.
- Understanding the compatibility between different adhesive and composite types is crucial for clinical success.
Purpose of the Study:
- To evaluate the microtensile bond strength (microTBS) of four distinct adhesive systems to human dentin.
- To compare the performance of self-etching and etch-and-rinse adhesives with both self-cured and light-cured resin composites.
- To identify potential incompatibilities between specific adhesive systems and resin composite curing modes.
Main Methods:
- Human molar teeth were prepared to expose superficial dentin.
- Four adhesive systems (All-Bond 2, One-Step Plus, OptiBond Solo Plus, Peak SE) were applied.
- Resin composites (self-cured Bisfil 2B, light-cured Filtek Supreme Plus) were incrementally placed, followed by microtensile bond strength testing after 24-hour water storage.
Main Results:
- All-Bond 2 and One-Step Plus showed consistent microTBS regardless of the resin composite curing mode.
- OptiBond Solo Plus exhibited significantly reduced microTBS when paired with a self-cured resin composite.
- Peak SE demonstrated a complete failure to bond with the self-cured resin composite.
Conclusions:
- Certain adhesive systems demonstrate inadequate bonding to dentin when used with self-cured resin composites.
- The low pH of some adhesives may interact negatively with specific self-cured resin composites, compromising bond integrity.
- Clinical implications include the potential for debonding of restorations due to adhesive-composite incompatibility.
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