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Restorative & Materials · single question

A crown preparation on a cast model and a corresponding silicone impression are both noted to have significant inaccuracies/defects. What should be done?

  1. Remake both the impression and, if necessary, recheck/redo the preparation before fabricating the final restoration
  2. Proceed to fabricate the final crown anyway and adjust later if needed
  3. Send the case to the lab and let them compensate for the defects
  4. Simply re-pour a new model from the same flawed impression
Show answer and explanation

Correct answer: A. Remake both the impression and, if necessary, recheck/redo the preparation before fabricating the final restoration

A demonstrably inaccurate impression and/or preparation should be redone before proceeding further — sending a flawed impression or model to the laboratory transfers the problem downstream and typically results in a poorly fitting final restoration requiring costly and time-consuming remakes, adjustments, or even complete redos after delivery.

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