Dental Dental Radiography

Question 1

What type of dental X-ray shows the entire tooth from crown to root tip and surrounding bone?

Accepted Answer

Periapical

Answer

Periapical radiographs capture the entire tooth structure including the root apex and surrounding alveolar bone.

Question 2

Bitewing radiographs are primarily used to detect which dental condition?

Accepted Answer

Interproximal caries

Answer

Bitewing X-rays are the standard diagnostic tool for detecting interproximal (between teeth) cavities and assessing crestal bone levels.

Question 3

What is the ALARA principle in dental radiography?

Accepted Answer

As Low As Reasonably Achievable

Answer

ALARA stands for As Low As Reasonably Achievable and is the guiding radiation safety principle requiring minimal exposure while obtaining diagnostically acceptable images.

Question 4

Which film placement technique uses a paralleling device to hold the film parallel to the long axis of the tooth?

Accepted Answer

Paralleling technique

Answer

The paralleling technique positions the film parallel to the tooth and directs the X-ray beam perpendicular to both, producing the most dimensionally accurate images.

Question 5

What does a radiolucent area appear as on a dental radiograph?

Accepted Answer

Dark/black

Answer

Radiolucent structures absorb fewer X-rays and allow more radiation to reach the film/sensor, appearing dark or black on the radiograph.

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Dental Dental Radiography