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Related Experiment Videos

Dentin bonding agents and composite retrograde root filling

C Ambus1, E C Munksgaard

  • 1Department of Dental Materials, School of Dentistry, Faculty of Health Sciences, University of Copenhagen, Denmark.

American Journal of Dentistry
|February 1, 1993
PubMed
Summary

Tenure Solution and Gluma were the best dentin bonding agents for retrograde composite root fillings, maintaining gap-free interfaces after thermal stress. Other agents showed gaps, indicating Tenure Solution and Gluma offer superior bond strength and sealing for this dental procedure.

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Area of Science:

  • Endodontics
  • Dental Materials Science

Background:

  • Retrograde root filling is a critical endodontic procedure.
  • Composite resins are commonly used, but their long-term stability requires evaluation.
  • Dentin bonding agents (DBAs) are essential for achieving a seal between the composite and dentin.

Purpose of the Study:

  • To assess the clinical applicability of five commercial dentin bonding agents for retrograde composite root fillings.
  • To evaluate bond strength and gap formation under thermal stress.
  • To identify optimal DBAs for enhanced retrograde filling success.

Main Methods:

  • In vitro evaluation of five commercial dentin bonding agents.
  • Shear bond strength measurements.
  • Microscopic examination of the dentin-filling interface.

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  • Thermal stress testing (thermocycling) to assess gap formation.

    • Main Results:

    • Tenure Solution and Gluma maintained gap-free interfaces after thermocycling.
    • Scotchbond 2, Prisma Universal Bond 3, and XR-Bonding System exhibited gaps following thermal stress.
    • A direct correlation was observed between gap-free interfaces and mean bond strength.

    Conclusions:

    • Dentin bonding systems Tenure Solution and Gluma are recommended for retrograde composite root fillings.
    • These agents provide superior interface integrity and bond strength compared to tested alternatives.
    • Proper DBA selection is crucial for preventing gaps and ensuring the longevity of retrograde root fillings.