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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...

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Related Experiment Video

Updated: Jun 23, 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

Coronal tooth structure in root-treated teeth prepared for complete and partial coverage restorations.

F Murphy1, A McDonald, A Petrie

  • 1UCL Eastman Dental Institute, Eastman Dental Hospital, London, UK.

Journal of Oral Rehabilitation
|May 9, 2009
PubMed
Summary

Complete coverage dental preparations remove significantly more tooth structure than partial coverage. This study used 3D-scanning and the Tooth Restorability Index (TRI) to quantify tooth structure loss, finding complete coverage preparations removed up to 45.23% more coronal tooth volume.

Related Experiment Videos

Last Updated: Jun 23, 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

Area of Science:

  • Restorative Dentistry
  • Dental Materials Science
  • Biomaterials Engineering

Background:

  • Assessing remaining coronal tooth structure is crucial for restoration longevity.
  • Complete coverage restorations often require more tooth reduction than partial coverage.
  • Standardized methods for quantifying tooth structure loss are needed.

Purpose of the Study:

  • To quantitatively compare the amount of coronal tooth structure removed by complete versus partial coverage preparations in vivo.
  • To evaluate the correlation between scanned tooth volume and the Tooth Restorability Index (TRI).
  • To understand how dentists' preparation choices impact tooth structure preservation.

Main Methods:

  • 3D-scanning (laser profilometry) was used to measure the volume of remaining coronal tooth structure in dies.
  • The Tooth Restorability Index (TRI) was employed by four observers to assess tooth structure.
  • Questionnaires recorded the initial preparation designs chosen by postgraduate and general dental practitioners.

Main Results:

  • Complete coverage preparations resulted in a significantly higher percentage loss of coronal tooth volume (3.29% to 45.23%) compared to partial coverage.
  • The mean TRI score decreased from 10.7 to 7.5 units after complete coverage preparation.
  • A strong correlation was found between the scanned volume of remaining tooth structure and the mean TRI (P = 0.013).
  • Over 50% of participating dentists changed their initial restoration design from complete to partial coverage.

Conclusions:

  • Complete coverage preparations necessitate greater removal of coronal tooth structure than partial coverage preparations.
  • 3D-scanning and the TRI provide reliable quantitative and qualitative assessments of remaining tooth structure.
  • Dentists' choices in preparation design significantly influence the preservation of coronal tooth structure.