CIT CIT Radiography & Imaging 4

Question 1

Which radiographic finding most strongly suggests peri-implant bone loss rather than normal crestal remodeling?

Accepted Answer

Vertical defect pattern extending apically along the implant body

Answer

Vertical or saucer-shaped defects extending apically along the implant indicate peri-implantitis rather than normal initial remodeling.

Question 2

In cone beam computed tomography (CBCT), what does the term 'voxel size' refer to?

Accepted Answer

The three-dimensional resolution unit of the reconstructed volume

Answer

Voxel size is the three-dimensional pixel unit that defines spatial resolution in CBCT volumes.

Question 3

A patient presents with a CBCT showing a dense, well-corticated radiopaque mass above the maxillary sinus floor. This is MOST consistent with:

Accepted Answer

Antrolith or rhinolith

Answer

A well-corticated radiopaque mass within or adjacent to a sinus is classic for an antrolith (sinus stone).

Question 4

When assessing the mandibular canal on a panoramic radiograph prior to implant placement, which limitation is MOST clinically significant?

Accepted Answer

Magnification and distortion can misrepresent canal position relative to proposed implant site

Answer

Panoramic magnification and geometric distortion make precise canal localization unreliable without cross-sectional imaging.

Question 5

Which CBCT artifact appears as bright streaks radiating from metallic restorations or implants?

Accepted Answer

Beam hardening artifact

Answer

Beam hardening causes bright streaks around dense metallic objects because low-energy photons are preferentially absorbed.

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