The purpose of the study was to find out the mechanisms that took part in the correction of deep-bite malocclusion of which bite opening is quite difficult and relapse is a common phenomenon. The study group was comprised of 24 female, 10 male subjects of whom 19 was rendered extraction and 15 non-extraction orthodontic treatment. The longitudinal research was carried out on lateral cephalograms which were taken prior to and subsequent to orthodontic treatment. The skeletal and dental measurements were obtained from cephalometric tracings and evaluated by Wilcoxon and Mann Whitney-U statistical analysis. In conclusion, it was determined that the correction of deep-bite was attained solely in the dentoaelveolar level and the position of lower incisor was crucial in this process. The result of the study pointed out the key role of lower incisor position in the treatment of deep-bite.

Keywords: Deep-bite, Mechanisms