Critical Thinking Qs #2

Question 1

This landmark appears as a U-shaped radiopacity superior to the maxillary molars on a periapical image.

Answer 1

Zygomatic process of the maxilla

Question 2

This tubelike landmark extends the length of the mandible and provides a passageway for blood vessels and the inferior alveolar nerve. On a mandibular posterior periapical image, it would appear as a radiolucent band that is outlined by two thin radiopaque lines.

Answer 2

Mandibular canal

Question 3

These radiopaque landmarks are bumps of bone that serves as attachment sites for the genioglossus and geniohyoid muscles. They are located on the lingual aspect of the mandible.

Answer 3

Genial tubercles

Question 4

What mandibular landmark appears as a radiolucent, round area near the apices of the mandibular premolars, and is means for blood vessels and nerves to supply the lower lip?

Answer 4

Mental foramen

Question 5

This ridge is a bony prominence located on the internal surface of the mandible that extends downward and forward from the ramus. It appears as a radiopaque line near the mandibular third molars on a periapical image.

Answer 5

Internal oblique ridge

Question 6

What is the correct order of density for these tooth structures? (starting with the most radiolucent)

Enamel, pulp, dentin

Answer 6

Pulp, dentin, enamel

Question 7

The inverted Y is a radiopaque landmark that refers to the intersection of the anterior border of the maxillary sinus and the lateral wall of the _____. It would be located above the maxillary canine on a periapical image.

Answer 7

Nasal cavity

Question 8

This is a marked prominence of bone on the anterior ramus of the mandible, serving as an attachment site for muscles of mastication. Although a mandibular landmark, it may be seen as a triangular radiopacity on a maxillary molar periapical image.

Answer 8

Coronoid process

Question 9

The nasopalatine nerve exits through the maxilla through this radiolucent landmark, which would be seen between the maxillary central incisors on a periapical image.

Answer 9

Incisive foramen

Question 10

The alveolar crest of bone between two teeth typically appears on an image as a radiopaque line located how far below the CEJ on a healthy patient?

Answer 10

1.5 to 2mm