Why is it important to have an airway built into the oral appliance?

With multiple areas of the airway associated with collapse and contributing to airway instability, an airway channel effortlessly increases the likelihood of efficacious treatment. Nasal restriction may be intermittent, given that allergies may be seasonal or environmental, whilst obstruction such as a deviated septum may be a more chronic condition. The integrated airway allows the patient to maintain a closed mouth while still receiving the airflow needed to breathe without compromising the stability of the airway. It also allows for continued, uninterrupted therapy and sleep for the patient. Cutting a hole in an oral appliance to facilitate mouth breathing can now be negated. This practice creates risk of airway destabilization.