J. Orthod.
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British Journal of Orthodontics, Vol 15, 87-92, Copyright © 1988 by British Orthodontic Society

ARTICLES

Fracture of polycarbonate brackets--a related photoelastic stress analysis

JC Aird, DT Millett and K Sharples
Area Orthodontic Service, Dumfries, Royal Infirmary.

In clinical use polycarbonate edgewise bracket designs, patterned on metallic predecessors, have demonstrated slot-wing fracture. A preliminary two-dimensional photoelastic stress investigation is described in which two bracket designs, without angles in the edgewise slot component, are subjected to simulated palatal root torque mechanics.




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Copyright © 1988 British Orthodontic Society.