Structural factors contributing to otitis media include dysfunction of which bone?

Structural factors contributing to otitis media include dysfunction of which bone?

• A. Temporal bone
• B. Maxilla
• C. Mandible
• D. Zygomatic bone

Answer: (A)

Otitis media is driven by poor ventilation and drainage of the middle ear. The temporal bone houses the tympanic cavity, the middle-ear ossicles, and the mastoid air-cell system, and it forms the osseous part of the Eustachian (pharyngotympanic) tube. When the temporal bone or its structures dysfunction—due to inflammation, congenital anomalies, or trauma—the Eustachian tube cannot ventilate the middle ear effectively. This creates negative pressure, fluid accumulation, and a setting prone to infection. The other bones listed do not contain the middle-ear spaces or the ventilation pathway, so they don’t contribute to otitis media in the same structural way.

Otitis media is driven by poor ventilation and drainage of the middle ear. The temporal bone houses the tympanic cavity, the middle-ear ossicles, and the mastoid air-cell system, and it forms the osseous part of the Eustachian (pharyngotympanic) tube. When the temporal bone or its structures dysfunction—due to inflammation, congenital anomalies, or trauma—the Eustachian tube cannot ventilate the middle ear effectively. This creates negative pressure, fluid accumulation, and a setting prone to infection. The other bones listed do not contain the middle-ear spaces or the ventilation pathway, so they don’t contribute to otitis media in the same structural way.