A posterior tooth with limited remaining crown structure needs a full crown. Which material provides the best choice?

Correct answer: B. All-metal (full cast) crown

• A. Composite resin lacks the strength needed for a full crown on a posterior tooth with limited structure.
• B. Correct. For a posterior tooth with limited remaining crown structure (short clinical crown), an all-metal (full cast metal) crown requires the least tooth reduction and provides maximum strength. It is the material of choice when vertical space is limited (e.g., deep bite, supraerupted opposing tooth).
• C. Lithium disilicate requires more tooth reduction for adequate ceramic thickness and is not ideal for very limited crown height situations.
• D. Leucite-reinforced ceramic is weaker than lithium disilicate and all-metal options — not suitable for limited crown structure.