Choice Of Multi-torque Options With A Passive Self-ligating Low-friction Orthodontic-technique

Objectives: to provide the clinician with usage policies to select the best torque-value for anterior teeth movement. Methods: retrospective critical review of cases treated selecting different levels of torque for upper and lower anterior teeth. Results: Upper incisors:high-torque in case of class-II division-2 malocclusion, when it's needed the use of class-II elastics, in almost all extractive treatments and in case of space closure mechanics; low-torque in case of class-III malocclusion and however in case of use of class-III elastics, when it's needed an increase of arch-width and in case of dental-crowding. Lower incisors: standard-torque in case of use of class III elastics, in case of extractive treatments; low-torque in case of severe dental-crowding of the anterior region, when it is needed to use class-II elastics, in case of severe deep-bite combined with the use of anti-spee arch-wires. Upper cuspids: standard-torque in case of low need of arch-width increase; high-torque in case of severe dental-crowding, in case of extractive treatments, when their root needs uprighting from vestibular to palatal position or their crown is erupted in a high vestibular position; low-torque when their crown is erupted in palatal displacement or when the tooth is in palatal inclusion, when their root needs uprighting from palatal to vestibular position. Lower cuspids: low torque in case of extractive treatments, when their root needs uprighting from vestibular to lingual position, in case of dental-crowding of the anterior region and of lingual displacement of their crown; high torque when all the circumstances of standard torque option are present at the maximum level. In all cases standard-torque with a good initial teeth position and with no needs of high-anchorage. Conclusion: multiple-choice options in upper and lower anterior teeth can be very useful to avoid unsought dental movements in the anterior region of the dental arch.