The nasal fossa is observed in which radiographic image?

• A. Maxillary canine
• B. Lateral cephalometric
• C. Panoramic
• D. Mandibular molar

Answer: (A)

The nasal fossa is the air-filled nasal cavity located above the maxillary teeth. On dental radiographs, you identify it by its appearance: a large radiolucent (dark) area bounded by a thin radiopaque line that marks the floor of the nasal cavity.

This view—often used for the maxillary canine region—places the beam and film so the floor of the nasal cavity sits just above the canine root. As a result, the nasal fossa shows up clearly on this image, with the nasal floor providing a distinct radiopaque border. That projection makes it the most straightforward intraoral view to visualize the nasal fossa.

Other views can show it as well (lateral cephalometric and panoramic), but they’re not as precise for a single tooth region, and a mandibular molar image won’t include the nasal cavity.