Differentiate a post-and-core restoration from a core build-up without a post, and explain how ferrule affects these choices.

Differentiate a post-and-core restoration from a core build-up without a post, and explain how ferrule affects these choices.

• A. Ferrule weakens tooth structure and should be avoided
• B. A post provides retention for a core when substantial tooth structure is missing; a core without a post relies on other retention features; ferrule requires remaining tooth structure to help resist fracture and maintain crown integrity
• C. Core build-up always requires a post
• D. A post reduces retention; ferrule is not important

Answer: (B)