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Related Experiment Video

Updated: Sep 23, 2025

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

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Published on: April 15, 2021

Mandibular magnetic distractor: preclinical validation.

N Kadlub¹, J Dallard², N Kogane²

¹Unit of maxillofacial and plastic surgery, Reference Center for Cleft and Facial Malformation, Necker Children Hospital, 149 rue de Sèvres, Paris, France; University of Paris, Paris, France.

The British Journal of Oral & Maxillofacial Surgery

|May 11, 2022

Summary

This summary is machine-generated.

This study shows a new biocompatible device for magnetic mandibular distraction is feasible. Cadaver tests confirmed successful distraction, with surgeons satisfied with the novel internal device for improved patient comfort.

Keywords:

Cadaveric tests Craniofacial microsomia Magnetic devices Osteogenesis distraction Permanent magnet

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Last Updated: Sep 23, 2025

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Area of Science:

Biomaterials Science
Orthodontics
Surgical Devices

Background:

Previous studies demonstrated magnetic activation for mandibular distraction.
A novel biocompatible device was developed for evaluating distraction feasibility.

Purpose of the Study:

To assess the feasibility of mandibular distraction using a new device in cadaveric subjects.
To evaluate the device's functionality through bench testing and cadaveric trials.

Main Methods:

Measured transmitted torque between internal and external magnets at varying distances.
Evaluated device friction force and magnet resilience to sterilization.
Conducted cadaveric tests and surgeon satisfaction assessments.

Main Results:

A friction torque of 65.10^-3 N.mm was determined in the distractor mechanism.
Sterilization did not affect magnet properties.
Successful mandibular distraction was achieved in cadaveric trials with high surgeon satisfaction.

Conclusions:

The developed biocompatible device is feasible for mandibular distraction.
The device's internal nature may enhance patient comfort.
Further clinical trials are warranted after regulatory approval.