DRC DRC Anatomy & Radiographic Landmarks

Question 1

Which radiographic landmark appears as a radiopaque Y-shaped structure formed by the intersection of the floor of the nasal cavity and the anterior wall of the maxillary sinus?

Accepted Answer

Inverted Y

Answer

The inverted Y is a radiopaque landmark visible on periapical radiographs of the maxillary canine region where the nasal floor and maxillary sinus wall intersect.

Question 2

On a mandibular periapical radiograph, the mental foramen most commonly appears as which type of structure?

Accepted Answer

Radiolucent oval or round shadow

Answer

The mental foramen appears as a radiolucent oval or round shadow typically located near the apex of the mandibular premolars.

Question 3

The lamina dura is the radiographic representation of which anatomical structure?

Accepted Answer

Cortical bone lining the tooth socket

Answer

The lamina dura is the radiopaque line representing the dense cortical bone that lines the tooth socket (alveolus).

Question 4

Which structure appears as a radiopaque horizontal line running through the ramus on a panoramic radiograph?

Accepted Answer

Zygomatic arch

Answer

The zygomatic arch appears as a radiopaque horizontal band crossing the ramus of the mandible on panoramic radiographs.

Question 5

On a maxillary molar periapical radiograph, the floor of the maxillary sinus typically appears as a:

Accepted Answer

Thin radiopaque line superior to the molar roots

Answer

The floor of the maxillary sinus appears as a thin radiopaque line (cortical bone) visible superior to or adjacent to the roots of the maxillary molars.

(DRC) Dental Radiology Certification for Dental Hygienist Practice Test

(DRC) Dental Radiology Certification for Dental Hygienist Practice Test

DRC DRC Anatomy & Radiographic Landmarks