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Pediatric Dentistry · single question

5-year-old girl: injured tooth E one month ago; tooth E now darker. A bump appears near tooth F. What does the bump represent?

  1. Sinus tract (parulis) from necrotic tooth E
  2. Pyogenic granuloma
  3. Mucocele
  4. Eruption cyst of permanent tooth
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Correct answer: A. Sinus tract (parulis) from necrotic tooth E

Darkened tooth E = likely pulp NECROSIS after trauma. Bump (parulis/sinus tract) = endpoint of sinus tract draining the periapical abscess from necrotic tooth E. Sinus tract may exit near (but not from) the infected tooth.

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