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Adhesive-composite incompatibility, part II.

Ricardo M Carvalho1, Fernanda Cristina P Garcia, Safira M A e Silva

  • 1Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil. ricfob@fob.usp.br

Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [Et Al.]
|July 6, 2005
PubMed
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Dental professionals assumed resin composites were universally compatible. However, simplified adhesive systems can react with self- or dual-cured composites, causing debonding and reduced bond strength.

Area of Science:

  • Dental Materials Science
  • Biomaterials
  • Polymer Chemistry

Background:

  • Methacrylate-based resins in dental restorations were generally considered compatible.
  • Clinicians commonly mixed composite types and brands without issue.
  • The compatibility of simplified adhesive systems with various resin composites was presumed.

Purpose of the Study:

  • To investigate reported compatibility issues between simplified adhesive systems and self- or dual-cured resin composites.
  • To identify the chemical interactions leading to reduced bond strength and failure at the resin-adhesive interface.
  • To understand the implications for clinical practice regarding restorative material selection.

Main Methods:

  • Review of reported clinical failures involving self- or dual-cured core buildup composites and single-bottle adhesive systems.

Related Experiment Videos

  • Analysis of the chemical composition of simplified adhesive systems and self-/dual-cured composites.
  • Investigation of polymerization mechanisms and potential adverse reactions between material components.

    • Main Results:

    • Unexpected debonding was reported for specific combinations of simplified adhesives and self-/dual-cured composites.
    • Adverse chemical reactions were identified between acidic monomers in simplified adhesives and tertiary amines in self-/dual-cured composites.
    • Reduced bond strengths and interfacial failures were observed in incompatible combinations.

    Conclusions:

    • Compatibility issues exist between simplified adhesive systems and self- or dual-cured resin composites.
    • Acidic monomers in simplified adhesives can interfere with the polymerization of certain composites, leading to bond failures.
    • Careful material selection is crucial to avoid adverse reactions and ensure the longevity of dental restorations.