treatment of severe rotations of maxillary central incisors with whip appliance: report of three cases

the routine treatment for rotated maxillary incisor is a fi xed appliance, but in some instance the use of this method is impossible. in addition, in only limited cases of rotation, removable appliance is applicable. in this study, the use of a semi-removable appliance is presented, which has some benefi ts over the other methods. in this study, the corrections of about 70 -90° rotation of the maxillary central incisors in different phases of mixed dentition were performed in three patients using whip appliance. this method was performed using a simple removable appliance such as hawley appliance and whip spring that forced the couple to derotate the tooth. in all cases, treatment was successfully completed in relative short duration. whip appliance can be recommended as an effective method to correct rotation of maxillary incisor in mixed dentition with several advantages like rapid correction. key words: maxillary incisor, tooth rotation, whip appliance