الفهرس 
ACKNOWLEDGEMENTSOnly 14 pages are availabe for public view
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Abstract
The objective of this study was to evaluate and compare, the kinetic frictional force between two recent generation of frictionless brackets (fx SWLF and Damon 3MX), and one conventional bracket (Mini 2000). Seventy-two maxillary right stainless steel canine brackets, with slot size 0.022x0.028- inch, were used. The brackets were equally divided into three groups; Group І for the fx SWLF brackets, group ІІ for the Damon 3 MX (self-ligated) brackets, while group ІІІ was for Mini 2000 (conventional) brackets. Kinetic frictional resistance was measured in each group using three wires; 0.018, 0.016×0.022, and 0.018×0.025 inch st st wires.