Radiology · patient case question
What is the BEST diagnostic imaging for this condition?
Patient case: J-shaped radiolucency
Scenario: A tooth with a J-SHAPED (halo) radiolucency.
Show answer and explanation
Correct answer: A. CBCT
- A. Correct. CBCT provides three-dimensional imaging free of superimposition and can demonstrate the fracture line and the associated bone loss pattern when conventional two-dimensional films cannot. A vertical root fracture is only visible on a periapical when the X-ray beam happens to pass directly along the plane of the fracture.
- B. A panoramic radiograph has low resolution and considerable superimposition — the least suitable choice for a fine fracture line.
- C. Bitewings image crowns and crestal bone only and do not display the root apex at all.
- D. Periapical radiographs are the usual first-line film and may show the J-shaped lucency, but they miss many fractures because of the beam-angle limitation. (This question specified that PA was not among the options.)
Note: Beware of beam-hardening and metallic artefacts from posts and restorations on CBCT — they degrade exactly the region you are trying to assess.