ABSTRACT

The aim of this study was to investigate the dentoalveolar changes associated with the treatment class III anomalies characterized with maxillary narrowness and retrusion. Orthodontic study models of 20 patients before and after treatment were used. Distance and area measurements of these models are considered. The study models of 20 patients that were not treated served as a control group. Fourteen parameters were investigated on study models. Paired t test was used in group comparisons and independent student t test was used in between group comparisons. Palatal shelf area measurement in the premolar region was increased in both groups but the increases of the treatment group were larger (P<0.001-P<0.05). The changes in the other parameters were different from each other. Upper and lower arch perimeters (P<0.05), lower canine to canine distances (P<0.01), upper (P<0.00V and lower (P<0.05) premolar to premolar distances, palatal shelf area measurements in the molar region (P<0.00V increased significantly but premolar angulations (P<0.05) decreased significantly. Dentoalveolar changes were occurred as a result of modifications in the direction of growth.