Prosthodontics & Occlusion · single question
What material is used to check the internal fit of a crown before cementation?
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Correct answer: B. Vinyl polyether silicone (fit-checking material such as Fit Checker)
- A. Disclosing solution checks plaque on teeth — not crown fit.
- B. Correct. Vinyl polyether silicone (e.g., Fit Checker, Occlude spray) is placed inside the crown to check the internal fit. Thin areas in the material after seating indicate where the crown is binding internally and needs to be adjusted.
- C. Articulating paper checks occlusal contacts — it does not evaluate internal crown fit.
- D. Zinc oxide eugenol is a temporary cement — not used for fit checking.
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