Orthodontic airway imaging: the cutting edge in treatment planning.

The upper airway has long been an area of interest in orthodontics. A normal airway is an important factor in the physiologic growth of craniofacial structures. The imaging of the upper airway is an indispensable tool in the field of orthodontics. Differing methods of measurement of nasal airway dimensions and function have been proposed and utilized; each technique has its strengths and limitations. Upper airway imaging has allowed us to begin to understand the biomechanical bases for obstructive sleep apnea syndrome and mouth breathing. Modern developments in imaging have produced many options and methodologies. This article reviews the contemporary status of approaches in airway imaging and discusses potential future needs and directions.