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Effects of cyclic loading on selected post-and-core systems.

S E Reagan1, T J Fruits, C L Van Brunt

  • 1University of Oklahoma, College of Dentistry, Oklahoma City 73190, USA. stephen-reagan@uokhsc.edu

Quintessence International (Berlin, Germany : 1985)
|May 14, 1999
PubMed
Summary

This study found no significant difference in fatigue resistance among various post-and-core systems for restoring endodontically treated teeth. All tested systems may be suitable for clinical use.

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Area of Science:

  • Dental materials science
  • Biomaterials engineering
  • Prosthodontics

Background:

  • Restoring endodontically treated teeth often requires post-and-core systems.
  • Evaluating the fatigue resistance of these systems is crucial for long-term clinical success.
  • Different materials and designs exist, necessitating comparative studies.

Purpose of the Study:

  • To compare the fatigue resistance of different post-and-core systems.
  • To determine if material choice (amalgam vs. resin composite) affects fatigue performance.
  • To assess the suitability of various systems for restoring endodontically treated teeth.

Main Methods:

  • An in vitro fatigue testing machine was developed to simulate clinical loading.
  • Three types of post-and-core systems were tested: prefabricated posts with amalgam cores, prefabricated posts with resin composite cores, and cast post and cores.

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  • Fatigue testing continued until initial cement failure was detected by a transducer.

    • Main Results:

    • Resin composite core groups showed a higher number of cycles before failure.
    • However, no statistically significant differences in fatigue resistance were found between the tested post-and-core systems.
    • Initial cement failure was the criterion used to define failure.

    Conclusions:

    • All evaluated post-and-core systems demonstrated acceptable fatigue resistance.
    • The choice of post-and-core system may not significantly impact the longevity of restoration for endodontically treated teeth.
    • Further clinical studies could validate these in vitro findings.