Prosthodontics & Occlusion · single question
A crown is being cemented and does not seat fully. The margins are open on the distal and the bite is off. What is the most likely cause?
Show answer and explanation
Correct answer: A. Contact too tight on the distal interproximal
- A. Correct. If a crown does not fully seat and shows open distal margins with an off bite, the most likely cause is a too-tight interproximal contact on the distal. The contact prevents the crown from fully seating, resulting in high occlusion and open margins.
- B. Cement setting before seating is possible but the specific presentation (distal open margins) points to a contact issue.
- C. Insufficient reduction would cause internal fit issues, not a specific distal open margin.
- D. Shade does not affect seating.
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