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Related Experiment Videos

Retentive properties of three post-core systems

F Keyf1, E Sahin

  • 1Department of Prosthodontics, Hacettepe University, Ankara, Turkey.

Australian Dental Journal
|February 1, 1994
PubMed
Summary

Flexi-Posts showed superior retention in root canals compared to Para-Posts and Brasseler/Vlock-Posts, especially in medium and large diameters under tensile and shear forces.

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Area of Science:

  • Dental materials science
  • Endodontics
  • Biomaterials engineering

Background:

  • Post-core systems are crucial for restoring endodontically treated teeth.
  • Understanding the retention of different post systems is vital for clinical success.
  • Variations in post design and diameter may influence retention within the root canal.

Purpose of the Study:

  • To compare the retention of three post-core systems: Flexi-Posts, Para-Posts, and Brasseler/Vlock-Posts.
  • To evaluate retention under both tensile and compressive/shear forces.
  • To determine if post diameter affects retention characteristics.

Main Methods:

  • Forty-two extracted maxillary anterior teeth were endodontically treated and prepared for post placement.
  • Posts were cemented using zinc phosphate cement.
  • Tensile and compressive/shear forces were applied to measure post dislodgement resistance.

Main Results:

  • No significant difference in retention was found for small diameter posts.
  • Medium and large diameter Flexi-Posts demonstrated significantly higher retention than Para-Posts and Brasseler/Vlock-Posts.
  • Flexi-Posts were approximately twice as retentive in the medium diameter group under tensile force.

Conclusions:

  • Flexi-Posts exhibit superior retention compared to Para-Posts and Brasseler/Vlock-Posts, particularly in larger diameters.
  • Post diameter is a significant factor influencing the retention of post-core systems.
  • These findings have implications for selecting appropriate post systems in restorative dentistry.

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