Changes in upper airway width associated with Class II treatments (headgear vs activator) and different growth patterns.

Objective: To investigate the upper airways for anteroposterior width against different growth patterns and for alterations during various Class II treatments.

Materials And Methods: Cephalograms from three treatment groups (headgear, activator, and bite-jumping appliance) were evaluated by a single investigator at baseline and at the end of orthodontic treatment. Cephalograms were used to determine upper airway width at different levels in the anteroposterior plane.