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Post Length Guidelines — NDEB AFK MCQ

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ModerateEndodonticsPost Length GuidelinesNDEB AFK

What is the minimum remaining root length recommended before considering a post for restoration of an endodontically treated tooth?

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

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Correct answer: D — Post length should be at least equal to the clinical crown length, leaving a minimum of 4-5 mm of apical gutta percha seal

The recommended post length should be at least equal to the clinical crown length (or two-thirds of the root length, whichever is greater), and a minimum of 4-5 mm of gutta percha should remain at the apex to maintain the apical seal. This balanced approach provides adequate retention and resistance form while preserving the endodontic seal. Post space preparation should be done carefully to avoid perforation or weakening of the root.

Reference: Shillingburg – Fundamentals of Fixed Prosthodontics, 4th ed., 2012