Frictional resistance evaluation of orthodontic brackets and archwires with sliding mechanics using quantified simulation of canine retraction

grantor: University of TorontoThe purpose of this study was to evaluate by quantitative analysis the frictional resistance of bracket/archwire combinations using an experimental canine retraction model capable of tipping and uprighting to approximate orthodontic tooth movements representative of sliding mechanics. The friction testing apparatus for this study was comprised of an Instron testing machine apparatus, a load cell, and a servomotor interface for second order bracket control. This study demonstrated significant effects for bracket type, archwire type, archwire size, and archwire shape, as well as pair-wise interactions for bracket type/archwire type, bracket type/archwire size, bracket type/archwire shape, archwire type/archwire size, archwire type/archwire shape, and archwire size/archwire shape.M.Sc