CEPHALOMETRIC CHARACTERISTICS OF CLASS-II DIVISION-1 AND CLASS-II DIVISION-2 MALOCCLUSIONS - A COMPARATIVE-STUDY IN CHILDREN

A comparison of dentoskeletal morphology in 347 Class II division 1 an d 156 Class II division 2 malocclusions was performed using lateral ce phalometric radiographs. Children at the ages of 8-10 years and 11-13 years were evaluated. The results of the study revealed broad variatio ns in the variables analyzed. Skeletal Class II and Class III as well as hypo- and hyperdivergent maxillary/mandibular jaw base relationship s were seen in both malocclusion samples. Noteworthy was the high freq uency of cases with mandibular retrusion (Class II division 1 sample: 48% of the younger and 29% of the older subjects; Class II division 2 sample : 48% of the younger and 49% of the older subjects) and a short lower face (97% - 100%). In conclusion it can be said that, except fo r the position of the maxillary incisors, no basic difference in dento skeletal morphology exists between Class II division 1 and Class II di vision 2 malocclusions.