John Libbey Eurotext

L'Orthodontie Française


Mécanique de classe II et hyperdivergence mandibulaire Volume 71, issue 3, Septembre 2000


Class II mechanics are supposed to affect the vertical balance of the face when they are used in hyperdivergent patterns. We carried out a study about class II mechanics effects on 100 patients ; 50 of them are hyperdivergent (GoGn/SN≥37), and 50 non-hyperdivergent. They all were treated with an Edgewise appliance without any high pull head gear. The authors showed that GoGn/SN angles and Occ/SN tend to be minored in a squeletal open-bite population. Thus, Class II mechanics can be prescribed in any vertical facial pattern.