Restorable tooth #30: half the tooth fractured to the gum line, endodontically treated. What should be done?

Correct answer: A. Post, core, and full coverage crown

• A. Correct. A severely broken-down, endodontically treated molar with insufficient remaining coronal structure requires a post (for retention in the canal), a core (to rebuild missing tooth structure), and a full coverage crown (to protect remaining structure and restore function).
• B. An amalgam cusp-coverage restoration is insufficient for a tooth fractured to the gumline with this much structural loss; it lacks adequate retention and protection.