An analysis of force between attractive magnets used in orthodontics

Naser-ud-Din, S. (2005) An analysis of force between attractive magnets used in orthodontics. Journal of the College of Physicians and Surgeons Pakistan, 15 10: 634-637.

Author Naser-ud-Din, S.
Title An analysis of force between attractive magnets used in orthodontics
Journal name Journal of the College of Physicians and Surgeons Pakistan   Check publisher's open access policy
ISSN 1022-386X
Publication date 2005-10-01
Sub-type Article (original research)
Volume 15
Issue 10
Start page 634
End page 637
Total pages 4
Place of publication Karachi, Pakistan
Publisher College of Physicians & Surgeons Pakistan
Language eng
Formatted abstract
Objective: To compare the results of hard and soft attractive magnet combinations to the gold standard Neodymium Iron Boron Magnets used for extrusion of impacted maxillary canines.
Design: Experimental and comparative study. Place and duration of study: Eastman Dental Institute and Hospital, London, UK in collaboration with Department of Physics and Astronomy University College of London (UCL) during 1996-1998.
Material and methods: In vitro experiments with combinations of hard and soft magnets of different morphologies. Load Cell Transducer was used to record the force levels in grams with magnets placed in different vertical, horizontal and angular offsets.
Results: Three-dimensional mesh plots were created to visualize force level decay with increasing distance. The results were compared with previous study on hard magnet combinations only and observed for "edge effect". The present study force levels were very low albeit the edge effect was negligible.
Conclusion: Although the edge effect phenomenon present with powerful hard magnets was minimal or nearly absent with the hard and soft magnet combination - the overall force levels were too low to be of any use in clinical scenario for extrusion of deep impacted canines.
Keyword Coercivity
Edge effect
Impacted maxillary canines
Neodymium iron boron
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Dentistry Publications
 
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Created: Thu, 24 Mar 2011, 23:48:35 EST by Dr Shazia Naser-ud-din on behalf of School of Dentistry