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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...
Brick Cutting Techniques01:08

Brick Cutting Techniques

Brick-cutting techniques involve various tools and methods to shape bricks for construction. A mason's hammer with a chisel-pointed end is used for basic shaping through sharp, precise strikes. For more complex shapes requiring higher precision, a power saw with a water-cooled diamond blade is used.
Cut bricks are categorized by size. Bricks cut to half their original length are called half-bats, while those cut to three-fourths their length are known as three-fourth bats.
Special types of cut...

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Related Experiment Video

Updated: Jul 14, 2026

Digital Hybrid Model Preparation for Virtual Planning of Reconstructive Dentoalveolar Surgical Procedures
09:10

Digital Hybrid Model Preparation for Virtual Planning of Reconstructive Dentoalveolar Surgical Procedures

Published on: August 5, 2021

Crown and bridge disassembly--when, why and how.

Liam D Addy1, A Bartley, S J Hayes

  • 1Department of Adult Dental Health, Cardiff University School of Dentistry, UK.

Dental Update
|May 18, 2007
PubMed
Summary

Dental crown and bridge removal can be destructive, but conservative disassembly methods exist. This paper classifies and explains these systems, aiding practitioners in restorative and endodontic procedures.

Area of Science:

  • Restorative Dentistry
  • Dental Prosthodontics

Background:

  • Dental crowns and bridges have limited lifespans and can fail due to various reasons.
  • Current methods for removing failed restorations are often destructive, potentially damaging underlying tooth structures.

Purpose of the Study:

  • To classify existing crown and bridge removal systems.
  • To describe the mechanisms of action for various removal systems.
  • To provide guidance on the appropriate clinical application of these systems.

Main Methods:

  • Literature review and classification of existing crown and bridge removal techniques.
  • Description of the operational principles of different removal systems.
  • Analysis of clinical scenarios favoring conservative removal.

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Last Updated: Jul 14, 2026

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Published on: August 5, 2021

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Main Results:

  • A classification system for crown and bridge removal tools is presented.
  • Detailed explanations of how various non-destructive removal systems function are provided.
  • Clinical indications and contraindications for conservative removal are discussed.

Conclusions:

  • Conservative disassembly of crowns and bridges is clinically relevant and often preferable to destructive removal.
  • Salvaging existing extracoronal restorations can be advantageous in specific dental procedures.
  • Understanding and utilizing appropriate removal systems can improve patient outcomes and treatment efficiency.