MJDF Dental Radiology and Imaging 2

Question 1

Which type of radiograph provides the best view of the periapical region and surrounding alveolar bone?

Accepted Answer

Periapical radiograph

Answer

Periapical radiographs are specifically designed to show the entire tooth from crown to root apex, including the surrounding periapical bone. They are the gold standard for diagnosing periapical pathology.

Question 2

A bitewing radiograph is MOST useful for detecting which of the following?

Accepted Answer

Interproximal caries and alveolar crest bone levels

Answer

Bitewing radiographs are specifically designed to show the crowns of upper and lower teeth simultaneously, making them ideal for detecting interproximal caries and assessing the alveolar crest height.

Question 3

The radiation protection principle 'ALARP' stands for:

Accepted Answer

As Low As Reasonably Practicable

Answer

ALARP — As Low As Reasonably Practicable — is the fundamental radiation protection principle requiring that radiation dose be kept as low as reasonably achievable while still obtaining a diagnostically useful image.

Question 4

On a periapical radiograph, which structure appears as a radiolucent crescent-shaped area around the apex of a non-vital tooth?

Accepted Answer

Periapical granuloma

Answer

A periapical granuloma (and early periapical abscess) typically appears as a well-defined radiolucent area around the root apex, representing inflammatory tissue replacing normal bone in response to pulpal necrosis.

Question 5

Which of the following best describes the appearance of enamel on a radiograph?

Accepted Answer

Radiopaque — appears very bright/white as enamel has the highest mineral content of any body tissue

Answer

Enamel is the most highly mineralized tissue in the human body (96% inorganic mineral) and therefore appears as the most radiopaque (brightest/whitest) structure on a dental radiograph.

MJDF Part 1 Practice Test

MJDF Part 1 Practice Test

MJDF Dental Radiology and Imaging 2