DOI: 10.36347/sjds.2018.v05i07.003

Pages: 365-371

Orthodontic tooth movements involve controlling crown and root positions in all three planes of space i.e. vertical, transverse and saggital planes. This can be achieved by various types of tooth movements like tipping, translation, rotation and torque. Torque can be expressed in Begg’s, Refined Begg’s, Tip edge technique which uses round wire with the help various torquing auxiliaries. In edgewise technique the control of torque is achieved by interaction of rectangular arch wire in a rectangular bracket slot. The purpose of this study is to investigate the effect of the third order torque on three different types of metal brackets having MBT prescription and manufactured by different companies. The study is done by analyzing the bracket’s plastic deformation in conjunction with the expressed torque at varying angles of twist.