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Related Experiment Videos

Dentin permeability: sealing the dentin in crown preparations.

E L Pashley1, R W Comer, M D Simpson

  • 1Medical College of Georgia, School of Dentistry.

Operative Dentistry
|January 1, 1992
PubMed
Summary

Dentin bonding agents can seal dentin in crown preparations, preventing microleakage. Prisma Universal Bond 2 and Superbond powder plus liquid offered the best protection against bacterial invasion.

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Area of Science:

  • Dental Materials Science
  • Restorative Dentistry
  • Biomaterials

Background:

  • Provisional restorations and cemented castings in full crown preparations are susceptible to microleakage.
  • Microleakage allows bacterial ingress, potentially harming the pulp.
  • Sealing dentin with bonding agents is a potential method to mitigate microleakage.

Purpose of the Study:

  • To evaluate the efficacy of six dentin bonding agents in sealing dentin preparations for full crowns.
  • To assess the long-term sealing ability and protection against microleakage provided by these agents.

Main Methods:

  • In vitro evaluation of dentin bonding agents on human teeth crown preparations.
  • Quantification of fluid filtration across dentin before and after bonding agent application.

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  • Measurement of silver nitrate penetration through dentin bonding agent veneers.
  • Inclusion of thermocycling to simulate intraoral conditions.

    • Main Results:

    • Two methods (fluid filtration and silver nitrate penetration) showed good correlation.
    • Prisma Universal Bond 2 and Superbond powder plus liquid demonstrated the most effective dentin sealing.
    • Gluma and Superbond liquid only provided the poorest seals.
    • Clearfil PhotoBond, Amalgambond, and Scotchbond 2 yielded intermediate results.

    Conclusions:

    • Dentin bonding agents show promise in protecting the pulp from microleakage consequences.
    • Optimizing dentin sealing with bonding agents can be a valuable adjunct in full crown preparations.
    • Specific agents like Prisma Universal Bond 2 and Superbond powder plus liquid are superior for dentin sealing.