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Periapical Pathology vs Normal Anatomy — NDEB AFK MCQ

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ModerateRadiology & ImagingPeriapical Pathology vs Normal AnatomyNDEB AFK

Which of the following clinical signs most reliably distinguishes a true periapical pathology from a normal anatomic variant (large incisive foramen or mental foramen) on radiograph?

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Correct answer: D — Loss of the lamina dura around the associated tooth apex and/or non-vital pulp response on vitality testing

The most reliable clinical method to distinguish periapical pathology from a normal anatomical radiolucency (incisive foramen, mental foramen, maxillary sinus, nutrient canal) is pulp vitality testing. Periapical pathology (granuloma, cyst, abscess) is associated with a non-vital (necrotic) pulp, while anatomical variants have adjacent teeth that are vital. Additionally, loss of the lamina dura (the radiopaque line surrounding the root) at the apex suggests periapical pathology. CBCT can confirm the anatomical relationship between the radiolucency and the root apex.

Reference: White & Pharoah – Oral Radiology: Principles and Interpretation, 8th ed., 2019