1989 Volume 38 Issue 4 Pages 1091-1098
The purpose of this paper is to show one of the best ways to correct the cases in which central incisor is to be extracted in early stage. Three cases with extraction of the central incisor were reported here. In each case upper canine and lateral incisor were transpositioned successfully. After canine erupted in the position of central incisor, orthodontic appliances were placed to align the upper arch. First premolor in the opposite side was extracted in order to correct the midline deviation and to retract the anterior segment. After the alignment of arches, only canine was reshaped as central incisor prothodontically.
The prevalence of the transposition of canine and lateral incisor depends on the relative position of crown of canine to root of the lateral incisor in the bone. W e suggest, therefore, abnormality of the central incisor must be found at as early stage as possible in order to set the treatment planning including the transposition of before-mentioned teeth.
