Dimensional variability of orthodontic slots and archwires: an analysis of torque expression and clinical implications

摘要

The brackets included in the present investigation. a Upper right central incisor from Group 1 (Astar Orthodontics Inc., Shanghai, China). b Upper right canine from Group 1. c Upper right first premolar from Group 1. d upper right central incisor from Group 2 (Sia Orthodontic Manufacturer S.r.l., Rocca D’Evandro, Caserta, Italy). e Upper right canine from Group 2. f Upper right first premolar from Group 2. g Upper right central incisor from Group 3 (Sweden & Martina S.p.A, Due Carrare, Padova, Italy). h Upper right canine from Group 3. i Upper right first premolar from Group 3