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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.
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Related Experiment Video

Updated: Sep 1, 2025

Studying Orthodontic Tooth Movement in Mice
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Dynamic changes in tooth displacement and bone morphometry induced by orthodontic force.

Chen Zong1, Jeroen Van Dessel2, Greetje Vande Velde3

  • 1Department of Oral Health Sciences-Orthodontics, KU Leuven and Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, blok A, bus 7001, 3000, Leuven, Belgium. chen.zong@kuleuven.be.

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|August 11, 2022
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Summary

Orthodontic tooth movement (OTM) in rats revealed a

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Area of Science:

  • Biomedical Engineering
  • Orthodontics
  • Dental Research

Background:

  • Longitudinal analysis of orthodontic tooth movement (OTM) and alveolar bone changes is crucial for understanding treatment efficacy.
  • Current 3D analysis methods often lack the precision for detailed longitudinal tracking of OTM and associated bone morphometry.

Purpose of the Study:

  • To longitudinally evaluate orthodontic tooth movement (OTM) and bone morphometry using a novel 3D analysis technique.
  • To investigate the dynamic changes in tooth position and alveolar bone structure during OTM in a rat model.

Main Methods:

  • A novel 3D analysis approach was employed to longitudinally track OTM in Wistar rats.
  • In vivo micro-computed tomography (micro-CT) scans were acquired at multiple time points during orthodontic force application.
  • A rigid voxel-based registration method was utilized for accurate superimposition of scans, enabling precise 3D dynamic analysis.

Main Results:

  • Orthodontic tooth movement (OTM) exhibited a non-constant 'V' shape pattern over time.
  • Applied orthodontic force (OF) induced displacement in both loaded and unloaded teeth, with delayed mirroring in unloaded teeth.
  • Alveolar bone morphometric changes correlated with OTM rate, indicating increased bone loss with higher movement rates.

Conclusions:

  • The study demonstrates a novel 3D analysis for precise longitudinal OTM and bone morphometry evaluation.
  • Findings suggest a dynamic 'V' shaped OTM pattern and linked bone remodeling, providing insights into pressure and tension zones.
  • Results offer valuable evidence for clinical, translational, and basic orthodontic research.