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Related Concept Videos

Tooth Anatomy01:21

Tooth Anatomy

The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.

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Related Experiment Video

Updated: Jul 18, 2026

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
07:42

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Published on: December 20, 2024

Flexural properties of endodontic posts and human root dentin.

Gianluca Plotino1, Nicola M Grande, Rossella Bedini

  • 1Department of Endodontics, Catholic University of Sacred Heart, Rome, Italy. gplotino@fastwebnet.it

Dental Materials : Official Publication of the Academy of Dental Materials
|November 23, 2006
PubMed
Summary

Fiber-reinforced composite (FRC) posts better match human root dentin's elastic modulus than metal posts. Both FRC and metal posts exhibit significantly higher flexural strength than dentin.

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Last Updated: Jul 18, 2026

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
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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

In situ Compressive Loading and Correlative Noninvasive Imaging of the Bone-periodontal Ligament-tooth Fibrous Joint
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In situ Compressive Loading and Correlative Noninvasive Imaging of the Bone-periodontal Ligament-tooth Fibrous Joint

Published on: March 7, 2014

Area of Science:

  • Biomaterials Science
  • Dental Materials Science
  • Mechanical Engineering

Background:

  • Endodontic posts are used to restore teeth with significant coronal destruction.
  • Selecting the appropriate post material is crucial for preserving tooth structure and function.
  • Fiber-reinforced composite (FRC) and metal posts are common choices, each with distinct mechanical properties.

Purpose of the Study:

  • To compare the flexural modulus and flexural strength of various endodontic posts against human root dentin.
  • To investigate the mechanical behavior of different post materials under simulated physiological loading.

Main Methods:

  • Three types of FRC posts and three types of metal posts (n=10 each) underwent three-point bending tests.
  • Human root dentin bars (n=20) were tested for flexural properties.
  • Scanning electron microscopy (SEM) examined fracture modes of selected fiber posts.
  • One-way ANOVA and Bonferroni t-test analyzed data for significant differences (P<0.05).

Main Results:

  • Dentin exhibited a flexural modulus of 17.5±3.8 GPa and flexural strength of 212.9±41.9 MPa.
  • Post flexural modulus ranged from 24.4±3.8 GPa (silica fiber) to 108.6±10.7 GPa (stainless steel).
  • Post flexural strength varied from 879.1±66.2 MPa (silica fiber) to 1545.3±135.9 MPa (cast gold).
  • Significant differences (P<0.05) were found for both flexural modulus and strength among all groups.

Conclusions:

  • FRC posts demonstrate an elastic modulus closer to that of human root dentin compared to metal posts.
  • Metal posts possess a significantly higher elastic modulus than dentin.
  • The flexural strength of both fiber and metal posts is substantially greater than that of root dentin, being approximately four and seven times higher, respectively.