NBDHE NBDHE Dental Radiography and Interpretation 3

Question 1

Which of the following appears radiopaque on a dental radiograph?

Accepted Answer

Amalgam restoration

Answer

Amalgam is a high-density metal alloy that absorbs X-rays and appears as a bright white (radiopaque) area on radiographs.

Question 2

The maximum permissible dose (MPD) of radiation for occupationally exposed dental workers per year is:

Accepted Answer

0.05 Sv (5 rem)

Answer

NCRP guidelines set the annual MPD for occupationally exposed workers at 0.05 Sv (50 mSv or 5 rem) per year.

Question 3

Interproximal bone loss appearing parallel to the cementoenamel junction (CEJ) on a bitewing radiograph is classified as:

Accepted Answer

Horizontal bone loss

Answer

Horizontal bone loss occurs when bone resorption proceeds evenly, resulting in a pattern parallel to the CEJ.

Question 4

The ALARA principle in radiography stands for:

Accepted Answer

As Low As Reasonably Achievable

Answer

ALARA means 'As Low As Reasonably Achievable' and guides practitioners to minimize patient radiation exposure while obtaining diagnostic quality images.

Question 5

A ghost image on a panoramic radiograph is characterized by:

Accepted Answer

Appearing on the opposite side of the object, higher and blurred

Answer

Ghost images on panoramic radiographs appear on the opposite side of the object, positioned higher and more blurred than the real image.

NBDHE Test Practice Test

NBDHE Test Practice Test

NBDHE NBDHE Dental Radiography and Interpretation 3