Endodontics · patient case question
How should the draining sinus tract itself be managed?
Patient case: The Bridge That Never Settled
Patient: 58-year-old male
Chief Complaint: “That front tooth aches when I bite, and a little bump keeps coming and going on the gum.”
Background: Anterior maxillary fixed bridge placed five years ago. Root canal treatment on tooth #9 two years ago. No relevant medical history.
Medications: None
Vital Signs: BP 128/78 mmHg · HR 74 bpm · RR 16 · T 98.4°F
Findings: Tooth #9 is tender to percussion and gives no response to cold. A small red, raised lesion is present on the labial gingiva apical to #9, which the patient reports drains intermittently. A periapical film shows a radiolucency at the apex of #9 and a second, separate radiolucency between #8 and #9.
Show answer and explanation
Correct answer: C. Complete the root canal retreatment — the tract closes once the source is eliminated
- A. Excising the tract is unnecessary and it will simply re-form if the source persists. If a tract fails to close within a few weeks of adequate treatment, THEN reassess for a missed canal, a vertical root fracture, or a non-endodontic lesion.
- B. Incision and drainage is for a FLUCTUANT acute swelling with no drainage pathway. This lesion is already draining — the pressure is vented.
- C. CORRECT. A sinus tract is a SYMPTOM, not a disease. It is epithelium-lined granulation tissue that exists only because infected necrotic pulp is feeding it. Eliminate the intracanal infection with (re)treatment and the tract resolves spontaneously, usually within days to a couple of weeks. No separate surgical or antibiotic management is required.
- D. Antibiotics are not indicated for a localized chronic apical abscess in a healthy patient with no systemic signs. They do not reach the necrotic canal, which has no blood supply, and only delay definitive care.