ABSTRACT

The aim of this research was to compare the three dimensional (3D) craniofacial measurements with conventional two dimensional cephalometric measurements in patients with skeletal Class III malocclusion. The study was carried out on lateral cephalograms and axial computed tomography (CT) images of 44 patients. The 3D images were obtained and measured with Mimics 12.01 image processing software. Anatomic landmarks were first designated on the 3D surface model, and their positions were verified on sagittal, coronal, and axial planes. 14 angular and 18 linear measurements were performed on 3D images, and conventional cephalograms. After the evaluation of the results it was determined that the conventional two dimensional cephalometry and computer aided three dimensional cephalometry were close in depicting angular relations of structures, but they differed in the accuracy of linear measurements, except Nperp-A, Nperp-Pog, Overjet, Overbite, L1-NB, UL-E and LL-E.