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External cervical resorption — NDEB AFK MCQ

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HardEndodonticsExternal cervical resorptionNDEB AFK

A 33-year-old has a pink discolouration near the cervical area of tooth 2.1. The tooth tests vital, probing is normal, and periapical radiographs at different angles show a radiolucency that shifts relative to the canal outline. What is the most likely diagnosis?

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Correct answer: B — External cervical resorption

A cervical radiolucency that shifts relative to the canal with parallax and a vital pulp supports external cervical resorption. Internal resorption usually remains centred on the canal space on angled radiographs. The pearl is that localisation with parallax or CBCT can determine restorability and whether pulpal treatment is needed.

Reference: Endodontic reference texts; RCDSO radiograph prescribing guidance