Prosthodontics & Occlusion · single question

A crown examined on a die shows a small space between the crown's internal surface and the die. What does this space represent?

  1. Ceramic fracture
  2. Inadequate crown reduction
  3. Defective margin requiring repair
  4. Die spacer space (reserved for cement thickness)
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Correct answer: D. Die spacer space (reserved for cement thickness)

DIE SPACER space = reserved for cement layer between crown and tooth. Without this space, hydraulic pressure of cement prevents full seating. Standard die spacer = ~20-40 microns. NOT applied to the cavosurface margin area (last 0.5mm) to ensure accurate marginal fit.

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