Radiology · single question

An 8-year-old has retained #8 and #9. An occlusal radiograph arrow points to a midline radiopaque structure with the lateral incisors superimposed. The most likely structure is:

  1. A normal anatomical feature (e.g., anterior nasal spine / incisive region)
  2. Ghost tooth
  3. Follicle
  4. Artifact
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Correct answer: A. A normal anatomical feature (e.g., anterior nasal spine / incisive region)

  • A. Correct. A well-defined midline radiopacity superimposed in the anterior maxilla on an occlusal film is most consistent with normal anatomy (anterior nasal spine/incisive structures).
  • B. "Ghost tooth" (regional odontodysplasia) shows faint, poorly mineralized teeth, not a discrete radiopacity.
  • C. A follicle is a radiolucent (not radiopaque) pericoronal space.
  • D. An artifact would not be a consistently positioned midline anatomical opacity.

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