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Related Experiment Video

Updated: Jun 16, 2025

Studying Orthodontic Tooth Movement in Mice
07:17

Studying Orthodontic Tooth Movement in Mice

Published on: August 2, 2024

664

Studying Orthodontic Tooth Movement in Mice.

José Alcides Almeida de Arruda1, João Pacheco Colares2, Mariana de Souza Santos3

  • 1Department of Oral Diagnosis and Pathology, School of Dentistry, Universidade Federal do Rio de Janeiro.

Journal of Visualized Experiments : Jove
|August 19, 2024
PubMed
Summary
This summary is machine-generated.

This study details an optimal 0.35 N force for orthodontic tooth movement (OTM) in mice. Researchers quantified OTM and root resorption using micro-CT, advancing bone remodeling understanding for better orthodontic treatments.

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Area of Science:

  • Biomedical Engineering
  • Orthodontics
  • Bone Biology

Background:

  • Orthodontic tooth movement (OTM) involves bone remodeling, with resorption and deposition at compression and tension sites, respectively.
  • Osteoclasts and osteoblasts drive these bone adaptation processes, making OTM a model for studying mechanical force effects.
  • Understanding root resorption and cellular responses is crucial for effective orthodontic strategies.

Purpose of the Study:

  • To establish an optimal force protocol for investigating orthodontic tooth movement (OTM) in a mouse model.
  • To quantify OTM and analyze orthodontic-induced inflammatory root resorption.
  • To contribute to a deeper understanding of bone remodeling and orthodontic treatment development.

Main Methods:

  • A mouse model was used with a nickel-titanium (NiTi) coil spring to apply a 0.35 N force for OTM.
  • Micro-computed tomography (micro-CT) was employed to measure OTM by assessing linear distance changes at the cement-enamel junction.
  • Root resorption was evaluated by analyzing root mineral density and the percentage of root volume.

Main Results:

  • The study established 0.35 N as the optimal force for inducing OTM in the mouse model.
  • Micro-CT analysis successfully quantified OTM and provided insights into root resorption parameters.
  • The protocol allowed for detailed assessment of bone remodeling and root changes during OTM.

Conclusions:

  • The developed protocol provides a straightforward method for investigating OTM and associated bone remodeling.
  • Findings enhance the understanding of cellular responses to mechanical forces in orthodontics.
  • This research supports the development of more effective orthodontic treatment strategies and interventions.