Oropharyngeal Airway Volume in Class II Dental Relationships

Evaluating oropharyngeal airway volume in patients with Class II dental relationships with extraction vs non-extraction orthodontic treatment. Purpose: The purpose of this study is to demonstrate that the oropharyngeal volume does not decrease as a result of premolar extractions and orthodontic treatment. Cone-beam CT’s were obtained for twenty-seven orthodontic patients before and after treatment. Nine patients were treated with four premolar extractions and eighteen treated non-extraction. Total oropharyngeal airway volume (TV) and minimum area of constriction (MAC) were measured using InVivo Anatomage Software.