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Related Experiment Videos

In vitro evaluation of endodontic posts.

J L Drummond1

  • 1Department of Restorative Dentistry, College of Dentistry, University of Illinois at Chicago, 60612-7212, USA. drummond@uic.edu

American Journal of Dentistry
|January 5, 2002
PubMed
Summary
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Stainless steel and fibrous posts showed similar pullout strength in dental applications. However, fibrous posts experienced reduced flexure strength after thermal cycling, impacting their long-term durability.

Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Restorative Dentistry

Background:

  • Dental posts are crucial for restoring endodontically treated teeth.
  • Fiber-reinforced composite posts offer aesthetic and mechanical advantages over traditional metal posts.
  • Understanding post retention and durability is essential for clinical success.

Purpose of the Study:

  • To compare the pullout (shear) strength of stainless steel posts versus three types of fibrous posts.
  • To evaluate the influence of dentin bonding systems on post retention.
  • To assess the flexure strength of fibrous posts before and after thermal cycling.

Main Methods:

  • Extracted third molars were embedded in denture acrylic.
  • Post spaces were prepared, and posts were cemented using resin cement.

Related Experiment Videos

  • Pullout strength was tested in tension; flexure strength was evaluated before and after thermal cycling.

    • Main Results:

    • No significant difference in pullout (shear) strength was found among stainless steel and the tested fibrous posts.
    • A significant decrease in flexure strength was observed for fibrous posts after thermal cycling.

    Conclusions:

    • Both stainless steel and fibrous posts exhibit comparable retention in a simulated clinical environment.
    • Thermal cycling negatively impacts the flexure strength of fibrous posts, suggesting potential long-term degradation.
    • Further research is needed to optimize the longevity of fibrous posts.