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Related Experiment Videos

Reducing microleakage in Class II restorations: an in vitro study

G A Crim1, K W Chapman

  • 1Department of Diagnosis and General Dentistry, University of Louisville, School of Dentistry, Kentucky 40292, USA.

Quintessence International (Berlin, Germany : 1985)
|November 1, 1994
PubMed
Summary

This study evaluated methods to reduce microleakage in composite resin restorations. Using glass-ionomer cement or bonding agents effectively reduced marginal microleakage in Class II restorations.

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Area of Science:

  • Restorative Dentistry
  • Dental Materials

Background:

  • Class II composite resin restorations are prone to marginal microleakage.
  • Microleakage can lead to secondary caries and restoration failure.

Purpose of the Study:

  • To evaluate four methods for reducing marginal microleakage in directly placed Class II composite resin restorations.
  • To compare the efficacy of different liners and bonding agents in preventing microleakage.

Main Methods:

  • Extracted human molars underwent mesio-occlusal and disto-occlusal preparations with enamel margins.
  • Teeth were restored using one of four techniques with multi-incremental placement.
  • Restorations were subjected to dye penetration after water storage and thermocycling.

Main Results:

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  • Restorations with an enamel bonding agent showed severe microleakage.
  • Visible light-cured glass-ionomer cement, BondAband, and dentinal bonding agents significantly reduced marginal microleakage.

Conclusions:

  • Certain liners and bonding agents are effective in reducing marginal microleakage in Class II composite restorations.
  • Enamel bonding agents alone may not be sufficient to prevent microleakage in this context.