Maxillary Sinus
Question 1. Write briefly about the functions of the maxillary sinus.
Answer:
Functions of the maxillary sinus:
1. Olfactory and respiratory function.
- It is due to the maxillary sinus being regarded as an accessory space to the nasal cavity.
2. Humidification of air.
- It is due to the presence of ostium.
- Ostium may be large, situated in the hiatus semilunaris or it may be small, hidden in the depth of hiatus semilunaris.
“Understanding the maxillary sinus through FAQs: Anatomy, function, and clinical notes explained”
3. Protects internal structures like the brain and eyeball.
- Air is arrested in the sinus which is then brought to body temperature.
- As a result, the sinus protects the internal structure from exposure to cold.
4. Bacteriocidal activity.
- The maxillary sinus produces bacteriocidal lysozyme in the nasal cavity.
5. Resonance of voice.
6. Lightening of skull weight.
7. Enhancement of faciocranial resistance to mechanical shock.
“Importance of studying the maxillary sinus for medical students: Questions explained”
Question 2. Boundaries of the maxillary sinus
Answer:
The maxillary sinus is a four-sided pyramid
- The anterior-facial surface of the body of the maxilla
- Inferior – alveolar and zygomatic processes
- Superior – orbital surface
- Posterior – infratemporal surface
- Base – faces medially towards the nasal cavity
- Apex – faces laterally towards the body of the zygomatic bone
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