NBDHE NBDHE Dental Radiography and Interpretation 4

Question 1

The radiopaque line that represents the floor of the maxillary sinus on a periapical radiograph is known as the:

Accepted Answer

Cortical boundary of the maxillary sinus

Answer

The cortical boundary of the maxillary sinus floor appears as a thin radiopaque line superimposed over the maxillary molar roots.

Question 2

Which film speed is currently recommended by the ADA for intraoral radiography to minimize patient dose?

Accepted Answer

F-speed (Insight)

Answer

F-speed (Insight) film requires the least radiation exposure to produce a diagnostic image and is currently the fastest film speed recommended.

Question 3

A periapical radiograph shows a radiolucent lesion at the apex of a mandibular first molar with intact lamina dura. Vitality testing is positive. The most likely diagnosis is:

Accepted Answer

Normal anatomic variant such as the mental foramen

Answer

A radiolucency near the apex of a vital tooth with intact lamina dura most likely represents superimposition of the mental foramen, a normal anatomic structure.

Question 4

Which radiation protection device is most critical for the dental radiographer to wear during X-ray exposures?

Accepted Answer

Dosimeter badge

Answer

A dosimetry badge (personnel monitoring device) is the most critical protective measure because it records actual radiation exposure to ensure dose limits are not exceeded.

Question 5

On a panoramic radiograph, the hyoid bone is typically visible:

Accepted Answer

Below the mandible at the level of the cervical vertebrae

Answer

The hyoid bone appears as a radiopaque horseshoe-shaped structure below the mandible, projected over the cervical spine region.

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NBDHE NBDHE Dental Radiography and Interpretation 4