Variabilité comparée, des points des profils faciaux de la Classe II avant et après traitement

By calculating equiprobable (or “tolerance”) ellipses, it is possible to display the variability of profile points, defined by their S-N coordinates, in the three types of Class II malocclusions. In addition to allowing a direct comparison of these dispersions, discriminant function quantifies precisely and displays visually any changes observed during treatment. The method used to situate any point on an individual relative to a reference group is described.