Can a broken dental bridge cause eustachian tube dysfunction?

Eustachian tube : A broken dental bridge is unlikely to cause Eustachian tube dysfunction. Eustachian tube dysfunction may be due to swelling from infection, allergies or cancer in rare cases. Smoking and changes in air pressure (as on plane trips) can make discomfort worse.

Nope...: Dental restorations, including and fixed or removable bridgework, do not have any correlation with your eustachian tube(s).

It is possible: Misalignment of teeth due to a broken dental bridge can cause the jaw to close over each other improperly, causing TMJ syndrome with common symptoms fullness in the ear. Many patients with TMJ complain of soft, dull sounds and clogged ears. This is caused by the dysfunction of the Eustachian tube.

Dental bridge: Highly unlikely unless maybe you had a huge infection from decay in a tooth under the bridge. I have never seen or heard of this though. Maybe your have an ear infection or allergies? I would consult your physician.