Restorative & Materials · single question
What is the appropriate finish-line design for a monolithic zirconia crown?
Show answer and explanation
Correct answer: B. Shoulder (1 mm)
A 1 mm rounded shoulder or heavy chamfer is recommended for zirconia crowns — it provides enough bulk of material to resist fracture without excessive tooth reduction. Knife-edge and feather-edge margins do not provide sufficient strength for zirconia.
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