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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.
Teeth01:15

Teeth

The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
Fractures: Bone Repair01:27

Fractures: Bone Repair

Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...

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Related Experiment Video

Updated: Jun 2, 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

Fracture in teeth: a diagnostic for inferring bite force and tooth function.

James J-W Lee1, Paul J Constantino, Peter W Lucas

  • 1Ceramics Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA. james.lee@nist.gov

Biological Reviews of the Cambridge Philosophical Society
|April 22, 2011
PubMed
Summary

Cracks in teeth can predict bite force and tooth function in mammals. Studying enamel fractures reveals how teeth withstand damage during chewing, offering insights into dietary pressures.

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Area of Science:

  • Paleontology
  • Biomechanics
  • Materials Science

Background:

  • Teeth are prone to cracking, which can impact their function.
  • Understanding tooth fracture mechanics is crucial for inferring diet and behavior.

Purpose of the Study:

  • To investigate tooth cracking as a diagnostic tool for bite force and function.
  • To analyze fracture modes in enamel and their relation to tooth structure and material properties.

Main Methods:

  • Laboratory experiments on model teeth and human teeth under simulated biting conditions.
  • Examination of fossil and extant vertebrate specimens for characteristic enamel fractures.
  • Application of fracture mechanics principles to quantify critical bite forces.

Main Results:

  • Identified principal fracture modes in enamel during simulated biting.
  • Observed similar fracture patterns across a wide range of vertebrate species.
  • Developed quantitative relationships between bite force, tooth size, and enamel thickness.

Conclusions:

  • Tooth cracking provides insights into bite force and functional adaptations.
  • Enamel microstructure influences crack initiation and propagation, contributing to tooth damage tolerance.
  • This approach offers a novel method for reconstructing feeding ecology from fossil teeth.