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Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
The flexural properties of endodontic post materials.
Dominic A Stewardson1, Adrian C Shortall, Peter M Marquis
1University of Birmingham, School of Dentistry, Birmingham, West Midlands B4 6NN, UK. d.a.stewardson@bham.ac.uk
Summary
Fiber-reinforced composite (FRC) endodontic posts demonstrate superior flexural strength compared to metal posts. Proper sample dimensions are crucial for accurate flexural property testing of dental posts.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Dental Materials Science
Background:
- Endodontic posts are crucial for restoring function to endodontically treated teeth.
- Understanding the mechanical properties of post materials is essential for clinical success.
- Fiber-reinforced composite (FRC) posts offer potential advantages over traditional metal posts.
Purpose of the Study:
- To quantify the flexural strengths and moduli of various endodontic post materials.
- To evaluate the impact of sample diameter/length (D/L) ratio on measured flexural properties.
- To compare the mechanical performance of FRC posts against metal posts.
Main Methods:
- Three-point bend testing was performed on metal and FRC post samples of 2mm diameter.
- Mechanical properties were calculated using different support widths (16 mm, 32 mm, 64 mm).
- Weibull analysis was applied to the strength data to assess reliability.
Main Results:
- FRC posts exhibited flexural strengths exceeding those of gold and stainless steel, and comparable to titanium.
- Stainless steel had the highest flexural modulus; titanium and carbon fiber posts showed similar, higher moduli than gold.
- Glass fiber posts had lower moduli (41-57 GPa); decreasing L/D ratio significantly reduced flexural modulus for all materials.
Conclusions:
- FRC endodontic posts generally surpass the yield strength of metal posts.
- High Weibull modulus values indicate good clinical reliability for FRC posts.
- Accurate flexural property assessment necessitates appropriate L/D ratios in test samples.
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