while an oral appliance is positioned in the particular user's mouth to receive the particular user's teeth and is coupled to an orientation device using a post of the oral appliance, applying an impression material over the orientation device and the particular user's face including at least the particular user's mouth and a portion of the particular user's nose surrounding the particular user's nostrils, such that the impression material conforms to the orientation device and to the particular user's unique facial features;

removing the impression material from the particular user's face together with the orientation device,

creating a cast of the particular user's face using the impression material together with the orientation device as a mold, such that the cast conforms to the impression material and the orientation device; and

applying a deformable material to the cast of the particular user's face to form a custom medical mask for the particular user, such that the deformable material conforms to the cast;

wherein the custom medical mask is custom-fitted to the particular user's unique facial features and custom-oriented to the particular user's teeth; and

wherein the orientation device comprises at least one breathing passage configured to allow the particular user to breathe through the particular user's mouth when the particular user's mouth is covered with the impression material.