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Mechanical properties of endodontic posts

H Lambjerg-Hansen1, E Asmussen

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

Journal of Oral Rehabilitation
|February 19, 1998
PubMed
Summary
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This study evaluated 22 endodontic posts, finding mechanical properties varied by post dimensions and surface. Stability, not just retention, is crucial for selecting posts, favoring those with cylindrical crowns and conical bases.

Area of Science:

  • Dental Materials Science
  • Biomechanical Engineering

Background:

  • Endodontic posts are crucial for restoring function after root canal treatment.
  • Understanding the mechanical properties of available posts is essential for clinical success.

Purpose of the Study:

  • To evaluate the mechanical properties (stiffness, elastic limit, fracture resistance) of 22 commercial endodontic posts.
  • To correlate these properties with post dimensions and surface characteristics.
  • To provide guidance on optimal endodontic post selection.

Main Methods:

  • Mechanical testing of 22 commercially available endodontic posts.
  • Analysis of post width, shape, and surface structure.
  • Evaluation of stiffness, elastic limit, and resistance to fracture.

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Main Results:

  • Significant variations in mechanical properties were observed among the tested posts.
  • Post width, shape, and surface structure were identified as key factors influencing mechanical behavior.
  • Stability was found to be a more critical factor than retention for clinical performance.

Conclusions:

  • The mechanical properties of endodontic posts are highly variable and influenced by physical design.
  • Clinical selection should prioritize post stability over retention.
  • Cylindrical coronal and conical apical portions are recommended for optimal endodontic post design.