Beginning at the age of the second dentition, the bones of jaw, nose, throat, and chest are undergoing important changes-nasal occlusion.
"Civics and Health"
William H. Allen
"There's no reason for an occlusion," he said to Hayes.
"Eight Keys to Eden"
Mark Irvin Clifton
In the tertiary stage, a diffuse gummatous infiltration occurs, and is liable to be followed by ulceration, which spreads to the pharyngeal wall and soft palate, and, by causing cicatricial contraction and adhesions, may lead to narrowing or even complete occlusion of the communication between the pharynx and the naso-pharynx.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson