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Related Experiment Videos

Relationship between composite resins and dentin treated with bonding agents.

M Suzuki1, A J Gwinnett, R E Jordan

  • 1Division of Operative Dentistry, University of Western Ontario, London.

Journal of the American Dental Association (1939)
|January 1, 1989
PubMed
Summary

Dentin bonding agents fail to create a complete seal at the tooth-filling interface. These gaps, caused by resin material forces, compromise the integrity of dental restorations.

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Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Adhesive Dentistry

Background:

  • The dentin-composite resin interface is critical for successful dental restorations.
  • Polymerization contraction forces in resin materials can lead to interfacial stress.
  • Ensuring a gap-free interface is essential for restoration longevity and preventing secondary caries.

Purpose of the Study:

  • To investigate the presence and location of interfacial gaps between dentin and composite resin.
  • To evaluate the efficacy of current dentin bonding agents in preventing gap formation under functional stress.

Main Methods:

  • Microscopic analysis of the dentin-composite resin interface after application of various dentin bonding agents.
  • Assessment of interfacial integrity under simulated polymerization contraction forces.

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Main Results:

  • Gaps were identified at the dentin-composite resin interface in all tested bonding systems.
  • The tested dentin bonding agents did not fully prevent gap formation.
  • Interfacial gaps were insufficient to withstand polymerization contraction forces.

Conclusions:

  • Current dentin bonding agents do not provide a complete seal at the dentin-composite resin interface.
  • Interfacial gaps compromise the durability of composite resin restorations, particularly in complex preparations.
  • Further development of adhesive systems is needed to address polymerization-induced interfacial gaps.