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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

Studying Orthodontic Tooth Movement in Mice
07:17

Studying Orthodontic Tooth Movement in Mice

Published on: August 2, 2024

Orthodontically induced root resorption correlated with morphological characteristics.

Cristina Teodora Preoteasa1, Ecaterina Ionescu, Elena Preoteasa

  • 1Department of Oral Diagnosis and Ergonomics, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania. dr_elena_preoteasa@yahoo.com

Romanian Journal of Morphology and Embryology = Revue Roumaine De Morphologie Et Embryologie
|May 13, 2009
PubMed
Summary

Orthodontically induced root resorption is a common complication of fixed orthodontic treatment, particularly in males and older patients. Identifying anatomical risk factors can help prevent this irreversible process.

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The Establishment of a Murine Maxillary Orthodontic Model
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The Establishment of a Murine Maxillary Orthodontic Model

Published on: October 27, 2023

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Last Updated: Jun 23, 2026

Studying Orthodontic Tooth Movement in Mice
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Published on: August 2, 2024

The Establishment of a Murine Maxillary Orthodontic Model
04:11

The Establishment of a Murine Maxillary Orthodontic Model

Published on: October 27, 2023

Area of Science:

  • Dentistry
  • Orthodontics
  • Dental Morphology

Background:

  • Orthodontically induced root resorption (OIRR) is an irreversible complication of orthodontic treatment.
  • OIRR has significant medical, ethical, and legal implications.
  • Identifying risk factors is crucial for prevention.

Purpose of the Study:

  • To identify morphological risk factors associated with OIRR.
  • To correlate radiological OIRR with patient biological and anatomical features.

Main Methods:

  • Retrospective study of 50 patients.
  • Correlation analysis between OIRR prevalence/severity and biological/anatomical features.

Main Results:

  • No OIRR observed with removable appliances (0%).
  • High prevalence (96%) but low severity of OIRR with fixed appliances.
  • OIRR prevalence influenced by sex (higher in males), age (higher in older patients), and topography (higher in mandibular incisors).
  • Increased OIRR prevalence associated with anatomical variations like facial divergence, Angle malocclusion classes II and III, and root angulation.

Conclusions:

  • Fixed orthodontic appliances are associated with a high prevalence of OIRR.
  • Patient sex, age, and specific anatomical variations are significant risk factors for OIRR.
  • Certain anatomical features can predict the likelihood of OIRR during orthodontic treatment.