DMD DMD - Doctor of Medicine in Dentistry Dental Radiology and Imaging Questions and Answers 1

Question 1

Which radiographic technique uses a film or sensor placed parallel to the long axis of the tooth with a beam directed perpendicular to both?

Accepted Answer

Paralleling technique

Answer

The paralleling technique places the receptor parallel to the tooth and directs the central ray at 90° to both, producing the most geometrically accurate periapical images.

Question 2

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 directs clinicians to minimize patient radiation exposure while still obtaining diagnostically adequate images.

Question 3

Which type of dental X-ray provides the most comprehensive single-image view of both dental arches, TMJ, and surrounding structures?

Accepted Answer

Panoramic radiograph

Answer

A panoramic radiograph (orthopantomogram) captures both arches, all teeth, sinuses, and temporomandibular joints in one extraoral projection.

Question 4

Bitewing radiographs are primarily used to detect which type of dental lesion?

Accepted Answer

Interproximal caries and crestal alveolar bone loss

Answer

Bitewing radiographs show the crowns and crestal bone of both arches simultaneously, making them ideal for detecting proximal caries and early periodontal bone changes.

Question 5

A radiolucent halo surrounding the apex of a non-vital tooth on a periapical radiograph is most consistent with which diagnosis?

Accepted Answer

Periapical abscess or granuloma

Answer

A periapical radiolucency associated with a non-vital tooth indicates inflammatory breakdown of periapical bone, consistent with a granuloma, abscess, or cyst.

DMD - Doctor of Medicine in Dentistry Practice Test

DMD - Doctor of Medicine in Dentistry Practice Test

DMD DMD - Doctor of Medicine in Dentistry Dental Radiology and Imaging Questions and Answers 1