Maxillary sinus is described as a four sided pyramid containing base, apex, roof and floor. The apex of maxillary sinus extends________________?
Correct answer: A. Laterally into zygomatics process of maxilla
- A. Laterally into zygomatics process of maxilla
- B. Medially into zygomatic process of maxilla
- C. Laterally into lateral nasal wall
- D. Superiorly into floor of orbit
Explanation
The maxillary sinus is pyramidal, with its apex projecting laterally into the zygomatic process of the maxilla. Its base faces the lateral nasal wall, so the medial and lateral options involving the wrong structures are incorrect.
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