Restorative & Materials · single question
You are shown an image of a dental die. The cuts (die saw cuts) are positioned coronal to the finish line of the proximal margin. What should you do?
Show answer and explanation
Correct answer: C. The die CANNOT be used to make the crown — it must be remade
C) The die cannot be used — CORRECT.
Die saw cuts must be apical to the finish line (margin) to allow proper margin definition, margin access for waxing, and accurate marginal fit. If the saw cuts are CORONAL to the finish line, the margin is obscured/destroyed on the die, making it impossible to accurately reproduce the marginal area. A new impression and die must be made.
A) Using as-is: Would result in an inaccurate crown margin — unacceptable.
B) Trimming the die: Cannot recover the lost margin information if the cut has destroyed that area.
D) Die relief: Addresses internal fit — does not solve an incorrectly cut margin.
Die saw cuts must be apical to the finish line (margin) to allow proper margin definition, margin access for waxing, and accurate marginal fit. If the saw cuts are CORONAL to the finish line, the margin is obscured/destroyed on the die, making it impossible to accurately reproduce the marginal area. A new impression and die must be made.
A) Using as-is: Would result in an inaccurate crown margin — unacceptable.
B) Trimming the die: Cannot recover the lost margin information if the cut has destroyed that area.
D) Die relief: Addresses internal fit — does not solve an incorrectly cut margin.
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