Post-RCT Percussion Sensitivity — NDEB AFK MCQ

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ModerateEndodonticsPost-RCT Percussion SensitivityNDEB AFK

A root-treated tooth that is tender to percussion but has no radiographic evidence of pathology is most likely suffering from which condition?

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Correct answer: D — Over-instrumentation or over-filling causing periapical irritation

Tenderness to percussion after root canal treatment (without radiographic pathology and with adequate obturation) most commonly indicates periapical irritation from over-instrumentation (file extrusion beyond the apex) or over-filling (sealer/GP extrusion). This irritation of the periapical tissues causes symptomatic apical periodontitis. It typically resolves within days to weeks with analgesics. Persistent symptoms beyond 6 months warrant further investigation (CBCT for missed canal, root fracture, or retreatment).

Reference: Torabinejad – Endodontics: Principles and Practice, 6th ed., 2021