NDHCE Dental Radiography 3

Question 1

Which of the following is the primary advantage of digital radiography over conventional film radiography?

Accepted Answer

Significantly reduced radiation dose

Answer

Higher image resolution

Answer

No radiation exposure required

Answer

Lower initial cost

Question 2

A patient presents with a periapical radiograph showing a well-defined radiolucency at the apex of a non-vital tooth. This most likely represents a:

Accepted Answer

Periapical abscess or granuloma

Answer

Periapical cemental dysplasia

Answer

External root resorption

Answer

Condensing osteitis

Question 3

What is the proper technique for handling and storing unopened dental X-ray film to prevent fogging?

Accepted Answer

Store in a cool, dry area away from radiation and chemicals

Answer

Store near the X-ray unit for convenience

Answer

Refrigerate all film below 4°C

Answer

Store in direct sunlight to keep dry

Question 4

Which collimation device reduces patient radiation exposure by limiting the size of the X-ray beam?

Accepted Answer

Position indicating device (PID)

Answer

Film holder

Answer

Bite block

Answer

Lead apron

Question 5

Which type of radiographic error is caused by incorrect horizontal angulation, resulting in overlapping of tooth contacts?

Accepted Answer

Overlapping

Answer

Foreshortening

Answer

Elongation

Answer

Cone-cut

Question 6

What does the acronym ALARA stand for in radiation protection?

Accepted Answer

As Low As Reasonably Achievable

Answer

Always Limit All Radiation Applications

Answer

Avoid Large Amounts of Radiation Annually

Answer

Apply Lowest Available Radiation Amount