A working die has an unclear/incorrect margin. What is true regarding fabricating the crown?

Correct answer: B. The die cannot be used to make an accurate crown (a new impression is needed)

• A. Incorrect – dies are routinely trimmed/ditched to expose and read the margin.
• B. Correct – if the finish line is not accurately captured/readable, an accurate crown margin cannot be fabricated; the die margin must be ditched/trimmed and, if the margin is truly not recorded, a new impression is required.
• C. Incorrect – an unreadable margin produces an ill-fitting crown.
• D. Incorrect. Arbitrarily carving a margin onto a flawed die fabricates a fictitious finish line; an accurate new impression/die is required.