Abstract
The feasibility of magnetic activation for mandibular distraction has been demonstrated
previously. In this study, we developed a biocompatible device to evaluate the feasibility
of distraction in cadaveric subjects and the functionality of the device in bench
tests. To confirm, considering the dimension of the distractor, that the torque applied
on the internal magnet would be sufficient to activate distraction osteogenesis we
measured, for different distances, the transmitted torque between a magnet (internal
and external). We evaluated the friction force of the device, and the resilience of
the magnet to the sterilisation process. To confirm the feasibility of distraction
with this device, we proceeded to cadaveric tests, and evaluated the satisfaction
of four surgeons. The force applied to the moving plate was greater than 50 Newtons
(N) with a friction coefficient of . We determined a friction torque of 65.10-3 N.mm in the distractor mechanism and demonstrated that sterilisation did not alter
the magnet. Mandibular distraction had been successfully achieved in cadaveric trials,
and surgeons were satisfied. This new device could be implanted in human subjects,
for clinical assay, after approval by the regulatory agencies. The use of this fully
internalised device should improve patients’ comfort.
Keywords
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Article Info
Publication History
Published online: November 16, 2021
Accepted:
November 9,
2021
Identification
Copyright
© 2021 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.
