Which term describes a smooth, depressed area of the maxilla between the lateral incisor and canine?

• A. The lamina dura.
• B. Lateral fossa.
• C. Inferior nasal concha.
• D. Maxillary sinus.

Answer: (B)

Recognizing normal anatomic landmarks on dental radiographs is essential for accurate interpretation. The smooth, depressed area of the maxilla between the lateral incisor and canine is called the lateral fossa (also known as the canine fossa). It appears as a shallow radiolucent area in the anterior maxilla and reflects thinner bone in that region, making it a normal feature rather than a sign of disease.

The lamina dura is the thin radiopaque line surrounding tooth roots, so it describes a surrounding border rather than a depression between teeth. The inferior nasal concha is a curved bony structure inside the nasal cavity, not a feature of the maxillary alveolar process. The maxillary sinus is a large air-filled cavity within the maxilla, located higher up and not the smooth depression between the lateral incisor and canine.