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Prosthodontics & Occlusion · single question

An existing PFM prosthesis is poorly adapted and cannot be re-cemented. What is the next step?

  1. Send directly to lab for repair
  2. Take alginate impressions for new study models
  3. Re-cement with stronger cement
  4. Remove the existing PFM prosthesis
Show answer and explanation

Correct answer: A. Send directly to lab for repair

  • A. Correct. When a fixed prosthesis is ill-fitting and cannot be re-cemented, the correct next step is to take alginate impressions (study models) to plan and fabricate a new restoration.
  • B. Incorrect. The PFM is already off/uncemented — removal is already done; the next step is impression taking.
  • C. Incorrect. Re-cementing a poorly adapted restoration causes microleakage, caries, and periodontal problems.
  • D. Incorrect. Sending to lab without new impressions would use inaccurate models.

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