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Related Experiment Videos

Cyclic fatigue testing of six endodontic post systems

B I Cohen1, A S Deutsch, B L Musikant

  • 1Essential Dental Laboratories, South Hackensack, NJ.

Journal of Prosthodontics : Official Journal of the American College of Prosthodontists
|March 1, 1993
PubMed
Summary

Four prefabricated post systems demonstrated superior cyclic fatigue resistance in simulated clinical conditions, with no failures observed after extensive testing. Cytco and Vlock posts showed lower resistance, failing during the cyclic fatigue analysis.

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Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Restorative Dentistry

Background:

  • Prefabricated posts are commonly used in endodontically treated teeth.
  • Evaluating the fatigue resistance of these posts is crucial for long-term clinical success.
  • Understanding material performance under stress is vital for prosthetic restorations.

Purpose of the Study:

  • To compare the cyclic fatigue resistance of six different prefabricated post systems.
  • To identify which post designs exhibit superior durability under simulated clinical loading.

Main Methods:

  • Cyclic fatigue testing was performed using an in vitro fatigue machine.
  • A consistent applied force of 5.0 pounds was used for all specimens.
  • Testing continued until post failure or completion of 2,000,000 repetitions.

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Main Results:

  • Only Cytco and Vlock prefabricated posts experienced failures during cyclic fatigue testing.
  • Flexi-Post, Flexi-Anterior, Parapost, and Access post systems showed no failures.
  • These four post systems exhibited greater resistance to cyclic fatigue.

Conclusions:

  • The experimental fatigue testing design effectively simulated clinical biting forces and stresses.
  • Certain prefabricated post designs offer significantly higher cyclic fatigue resistance.
  • Clinical implications suggest a preference for posts demonstrating superior fatigue performance.