Pediatric Dentistry · patient case question
What does she have?
Patient case: Case: a bump above tooth F
Scenario: A 5-year-old girl fell and lost tooth E a month ago. Three days ago a bump appeared on the gingiva over tooth F, which is now darker than the neighbouring teeth.
Show answer and explanation
Correct answer: D. A sinus tract from a necrotic pulp
- A. A mucocele results from a severed minor salivary gland duct and occurs mostly on the lower lip; it is not associated with a discoloured tooth.
- B. An eruption cyst is a bluish, fluctuant swelling directly over an erupting tooth crown, not over the root of an already-erupted, discoloured tooth.
- C. A pyogenic granuloma is a red, friable, easily bleeding overgrowth driven by local irritation, without a necrotic pulp behind it.
- D. Correct. Trauma, discoloration and then a gingival swelling over the root is a parulis — the opening of a sinus tract draining a necrotic pulp. The dark crown is the trauma-induced pulpal change that preceded it.
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