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Prosthodontics & Occlusion · single question

A cast post is placed in an endodontically treated premolar. Which of the following is NOT a valid rationale for the post?

  1. To retain a core/foundation for the crown
  2. To reinforce and strengthen the remaining root
  3. To aid retention of the definitive crown
  4. To replace lost coronal structure for the core
Show answer and explanation

Correct answer: B. To reinforce and strengthen the remaining root

  • A. A post does retain the core build-up.
  • B. Correct (this is the false statement). A post does NOT strengthen a root; placing one removes dentin and can increase fracture risk.
  • C. The post-and-core provides retention/resistance for the crown.
  • D. The core (retained by the post) replaces missing coronal tooth structure.

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