Rapid Correction Of Rotation With Modified Rotation Tie
“Tooth rotation, is defined as mesiolingual or distolingual intraalveolar displacement of the tooth around its longitudinal axis”. Number of factors are involved in the rotation of teeth like space inadequacy, abnormal tooth eruption sequence, and undesirable forces exerted by the tongue and lips or any above combination. Biomechanical principles involve application of single or couple of force for correction of rotation. Rotated teeth can be corrected by removable, semifixed or fixed appliance depending upon the severity of rotation. Removable appliance containing z spring along with labial bow and semifixed (whip appliance) can treat mild rotations. Fixed appliance is a treatment of choice for severe rotations of teeth. Derotation can be done by number of ways with fixed appliances 1. By engaging NiTi archwire into bracket slot. Because of its superelastic nature and creating 1st order couple as it regains its original shape. 2. Offcentered brackets bring slight ove...