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Related Concept Videos

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...
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.
Masonry Cavity Walls01:26

Masonry Cavity Walls

Cavity walls feature a hollow space between the outer and inner wythes, connected only by corrosion-resistant metal ties. When water seeps through the outer wythe, it descends within this cavity, intercepted by flashing and eventually exiting through weep holes. To enhance moisture resistance, the inner wythe's cavity side often receives damp-proofing, doubling as an air barrier. The cavity can also house insulation to mitigate heat transfer.
Maintaining a clean cavity during construction is...
Oral Cavity01:11

Oral Cavity

The oral cavity, or the mouth, is a complex structure in humans that plays a vital role in our day-to-day lives. Its role is not only in chewing and swallowing food; it also plays a role in speech and facial expressions.
Teeth: The teeth are the hardest structures in our bodies. Humans have two sets of teeth throughout their lifetime: deciduous (baby) teeth and permanent teeth. Each tooth consists of several parts: the crown (visible part), the root (embedded in the jaw), enamel (hard outer...
Veneer01:19

Veneer

Veneer refers to a thin sheet of wood, typically produced to a thickness of about one-eighth of an inch or less. This material is crafted through various methods, the most common being rotary cutting. In this process, a log is mounted into a large lathe and spun against a knife edge, peeling off a continuous strip of wood as the knife penetrates deeper into the rotating log, creating a rotary-cut veneer.
Other veneering techniques include plain-slicing, quarter-slicing, and rift-slicing. These...

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Related Experiment Video

Updated: May 31, 2026

Detection and Removal of Tooth-Colored Composite Resin Using the Fluorescence-Aided Identification Technique
05:42

Detection and Removal of Tooth-Colored Composite Resin Using the Fluorescence-Aided Identification Technique

Published on: July 27, 2022

Filling cavities or restoring teeth?

Antheunis Versluis1, Daranee Versluis-Tantbirojn

  • 1Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center, Memphis, TN, USA.

The Journal of the Tennessee Dental Association
|July 14, 2011
PubMed
Summary
This summary is machine-generated.

Dental restorations can increase tooth fracture risk. Bonded composite restorations, without polymerization shrinkage, can restore natural stress patterns, unlike unbonded amalgam, which increases stress. Bonding and stress reduction are key for tooth integrity.

More Related Videos

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation
08:45

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation

Published on: July 21, 2014

Related Experiment Videos

Last Updated: May 31, 2026

Detection and Removal of Tooth-Colored Composite Resin Using the Fluorescence-Aided Identification Technique
05:42

Detection and Removal of Tooth-Colored Composite Resin Using the Fluorescence-Aided Identification Technique

Published on: July 27, 2022

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation
08:45

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation

Published on: July 21, 2014

Area of Science:

  • Biomaterials Science
  • Dental Mechanics
  • Finite Element Analysis

Background:

  • Natural teeth are optimized for masticatory forces.
  • Intracoronal restorations can increase tooth fracture incidence by altering stress distribution.
  • Understanding stress patterns in restored teeth is crucial for preventing fractures.

Purpose of the Study:

  • To compare the stress distribution of intact teeth with teeth restored by unbonded amalgam and bonded composite restorations.
  • To evaluate the impact of polymerization shrinkage in bonded composite restorations on stress patterns.
  • To determine the conditions necessary for restoring original tooth integrity after restoration.

Main Methods:

  • Finite element analysis (FEA) was used to model and simulate stress distributions.
  • Simulations included intact teeth, teeth with unbonded amalgam restorations, and teeth with bonded composite restorations.
  • The effect of polymerization shrinkage in composite restorations was specifically analyzed.

Main Results:

  • Unbonded amalgam restorations did not replicate natural stress distribution, increasing stress in enamel and cavity floor.
  • Bonded composite restorations, in the absence of polymerization shrinkage, restored the original stress pattern.
  • Polymerization shrinkage in composite restorations induced residual tensile stresses in dentin and enamel.

Conclusions:

  • Bonded composite restorations are superior to unbonded amalgam in maintaining tooth integrity.
  • Eliminating residual stresses, particularly from polymerization shrinkage, is essential for effective restoration.
  • Achieving original tooth integrity requires both effective bonding and management of restorative material stresses.