ORE Part 1 Dental Radiology 2

Question 1

Which radiographic technique is most appropriate for detecting proximal caries in posterior teeth?

Accepted Answer

Horizontal bitewing radiograph

Answer

Periapical radiograph with paralleling technique

Answer

Dental panoramic tomograph

Answer

Lateral cephalogram

Question 2

What is the most common cause of a radiopaque (white) artefact on a digital dental radiograph?

Accepted Answer

Metallic restoration or prosthesis

Answer

Air bubble in processing chemicals

Answer

Light leak in the darkroom

Answer

Software malfunction

Question 3

The paralleling technique for periapical radiography requires a minimum focus-to-film distance of:

Accepted Answer

30 cm

Answer

10 cm

Answer

20 cm

Answer

40 cm

Question 4

Which structure appears as a radiolucent band across the roots of maxillary teeth on a DPT (OPG)?

Accepted Answer

Air shadow of the oropharynx

Answer

Maxillary sinus floor

Answer

Hard palate shadow

Answer

Nasal septum

Question 5

A cone-cut error on a periapical radiograph appears as:

Accepted Answer

A clear unexposed area on part of the image

Answer

A blurred image across the entire film

Answer

Double exposure of teeth

Answer

Excessive darkness of the entire image

Question 6

What is the effective dose of a single digital periapical radiograph approximately equivalent to?

Accepted Answer

1 day of UK background radiation

Answer

1 week of UK background radiation

Answer

1 month of UK background radiation

Answer

1 year of UK background radiation