Prosthodontics & Occlusion · single question
What is the primary purpose of a post in an endodontically treated tooth?
Show answer and explanation
Correct answer: D. Core retention
- A. Apical seal is achieved by gutta percha and sealer during root canal obturation — not by the post.
- B. Posts do NOT strengthen endodontically treated teeth — this is a common misconception. Posts actually weaken the root by removing tooth structure.
- C. The post retains the CORE — and the core retains the crown. The post itself does not directly retain the crown.
- D. A POST is placed to RETAIN THE CORE buildup in an endodontically treated tooth lacking sufficient remaining coronal tooth structure. The post does NOT strengthen the tooth — it actually weakens the root by removing dentin. Its ONLY purpose is to provide retention for the core, which then retains the crown.
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