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Related Experiment Video

Updated: Dec 26, 2025

Studying Orthodontic Tooth Movement in Mice

Studying Orthodontic Tooth Movement in Mice

Published on: August 2, 2024

Functional tooth mobility in young pigs.

Atriya Salamati¹, Jie Chen², Susan W Herring³

¹Depts. Orthodontics & Oral Health Sciences, University of Washington, School of Dentistry, Seattle, WA, USA; Dept. Pediatric Dentistry, Jacobi Medical Center, Bronx, NY, USA.

Journal of Biomechanics

|March 17, 2020

Summary

This summary is machine-generated.

Mammalian tooth mobility during chewing causes maxillary molars to move buccally and apically. This movement increases periodontal ligament (PDL) fluid pressure and bone strain, impacting tooth prognosis.

Keywords:

Bone strain Mastication Tooth mobility Ultrasound

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Last Updated: Dec 26, 2025

Studying Orthodontic Tooth Movement in Mice

Studying Orthodontic Tooth Movement in Mice

Published on: August 2, 2024

3D Imaging of PDL Collagen Fibers during Orthodontic Tooth Movement in Mandibular Murine Model

3D Imaging of PDL Collagen Fibers during Orthodontic Tooth Movement in Mandibular Murine Model

Published on: April 15, 2021

Author Spotlight: Insights into an Efficient Murine Maxillary Orthodontic Model Protocol

Author Spotlight: Insights into an Efficient Murine Maxillary Orthodontic Model Protocol

Published on: October 27, 2023

Area of Science:

Biomechanical Engineering
Dental Research
Mammalian Physiology

Background:

Tooth mobility is crucial for predicting tooth prognosis.
The precise direction and extent of tooth movement under functional loads remain unclear.

Purpose of the Study:

To investigate maxillary molar mobility, alveolar bending, and periodontal ligament (PDL) fluid pressure during mastication and masseter muscle contraction.
To measure PDL space dimensions in young pigs.

Main Methods:

Utilized ultrasonic crystals, rosette strain gauges, and pressure transducers in young pigs.
Recorded tooth mobility, alveolar bending, and PDL fluid pressure during feeding and masseter muscle stimulation.
Measured PDL widths using micro-CT.

Main Results:

Maxillary molars displaced buccally and apically (192 ± 95 µm) during the masticatory power stroke.
Compressive bone strain was higher on the buccal than the palatal alveolar plate.
PDL pressure increased significantly (3.63 ± 0.80 kPa) during the power stroke.

Conclusions:

Occlusal function induces buccal tipping and intrusion of maxillary molars.
This movement is associated with buccal alveolar plate compression and elevated PDL pressure.
PDL width did not correlate with measured tooth mobility.