DRC DRC Anatomy & Radiographic Landmarks 2

Question 1

The periodontal ligament space on a radiograph is identified as a:

Accepted Answer

Thin radiolucent line surrounding the tooth root

Answer

The periodontal ligament space appears as a thin, uniform radiolucent line surrounding the tooth root between the lamina dura and the root surface.

Question 2

On a bitewing radiograph, the alveolar crest in a healthy adult should be located approximately how far apical to the cementoenamel junction (CEJ)?

Accepted Answer

1–2 mm

Answer

In a healthy periodontium, the alveolar crest is normally located 1–2 mm apical to the CEJ on bitewing radiographs.

Question 3

Which radiographic landmark in the maxillary anterior region appears as an oval or heart-shaped radiolucent area between the central incisor roots?

Accepted Answer

Incisive foramen

Answer

The incisive foramen (nasopalatine foramen) appears as an oval or heart-shaped radiolucency located between the roots of the maxillary central incisors.

Question 4

The genial tubercles are radiographic landmarks found in which location?

Accepted Answer

Midline of the mandible near the lingual surface

Answer

The genial tubercles appear as a ring-shaped radiopaque structure at the midline of the mandible on the lingual surface, near the apex of the central incisors.

Question 5

On a panoramic radiograph, the soft palate and uvula may appear as:

Accepted Answer

A radiopaque ghost shadow in the midline

Answer

The soft palate and uvula can project as a radiopaque soft-tissue shadow in the midline area of the panoramic image, often overlying the maxillary teeth region.

(DRC) Dental Radiology Certification for Dental Hygienist Practice Test

(DRC) Dental Radiology Certification for Dental Hygienist Practice Test

DRC DRC Anatomy & Radiographic Landmarks 2