Angle Classification

The Angle Classification was conceived by E. H. Angle, the founding father of orthodontics, for classifying orthodontic deviations after the first molars have appeared: Angle-Class I refers to a neutral occlusion (normal bite), Angle-Class II refers to a distal occlusion (back-bite) and Angle-Class III refers to a mesial occlusion in the lower molars (forward bite). Although this is a very approximate classification, it is the standard method that is used almost everywhere in the world. The Angle Classification is problematic in cases of migration of the first molars after premature loss of milk teeth. Here it may be useful to remember the molars’ original position within the dental arch.