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Crown ferrule effect — NDEB AFK MCQ

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ModerateProsthodonticsCrown ferrule effectNDEB AFK

A maxillary canine needs a post-core crown after endodontic treatment. There is 1 mm of sound coronal dentine circumferentially after caries removal. Occlusion is canine-guided. What is the most important consideration?

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Correct answer: D — Need for adequate ferrule before crown placement

A ferrule of sound tooth structure improves resistance to fracture in post-core crowns; 1 mm circumferential dentine may be inadequate depending on case factors. A wider post does not strengthen the tooth and can increase root fracture risk. The pearl is to assess restorability before endodontic retreatment or definitive prosthodontics.

Reference: Prosthodontic/restorative reference texts; NDEB KSAs 2024