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Sodium hypochlorite accident — NDEB AFK MCQ

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ModerateEndodonticsSodium hypochlorite accidentNDEB AFK

During irrigation of tooth 1.6, a patient develops immediate severe pain, facial swelling, and bruising. The irrigating needle was bound near the working length. What is the most likely cause/mechanism?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: D — Extrusion of sodium hypochlorite beyond the apex

Immediate severe pain, swelling, and ecchymosis during irrigation strongly suggest a sodium hypochlorite extrusion accident. A postoperative endodontic flare does not occur instantly at the moment of irrigation. The pearl is to use side-vented needles, avoid binding, and keep irrigation needles short of working length.

Reference: Endodontic reference texts; NDEB KSAs 2024