EFDA Radiography & Infection Control 3

Question 1

Which film speed is recommended to minimize patient radiation dose in dental radiography?

Accepted Answer

F-speed (fastest)

Answer

F-speed (Insight) film requires the least radiation exposure to produce a diagnostic image, significantly reducing patient dose compared to slower film speeds.

Question 2

What is the proper technique for handling contaminated radiographic film packets after exposure?

Accepted Answer

Drop the film from the packet directly onto a clean surface

Answer

The 'drop technique' involves opening the contaminated packet with gloved hands and dropping the uncontaminated inner film onto a clean surface, preventing cross-contamination.

Question 3

Elongation of a radiographic image is caused by:

Accepted Answer

Insufficient vertical angulation

Answer

Elongation occurs when the vertical angulation is too flat (insufficient), causing the X-ray beam to strike the tooth and film at an angle that stretches the image.

Question 4

Which instrument should be sterilized rather than disinfected between patient uses?

Accepted Answer

Reusable film-holding device

Answer

Reusable film-holding devices are semi-critical instruments that contact mucous membranes and must be sterilized (or receive high-level disinfection) between uses.

Question 5

What type of radiation produces the greatest risk for dental patients during X-ray exposure?

Accepted Answer

Scatter radiation

Answer

Scatter radiation, which is deflected in all directions from the patient's tissues, represents the greatest source of unintended exposure during dental radiographic procedures.

(EFDA) Expanded Function Dental Auxiliary Practice Test

(EFDA) Expanded Function Dental Auxiliary Practice Test

EFDA Radiography & Infection Control 3