California Registered Dental Assistant (RDA) Written Practice Exam

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How do you prepare a crown for placement with permanent cement?

  1. Fill to the brim

  2. Line the interior surface

  3. Apply to the exterior

  4. Soak in cement

The correct answer is: Line the interior surface

Lining the interior surface is the correct way to prepare a crown for placement with permanent cement. Filling to the brim or applying cement to the exterior surface would result in excess cement, which can cause irritation to the gums or damage to the surrounding teeth. Soaking the crown in cement is not necessary and can actually weaken the bond between the crown and the tooth. Therefore, lining the interior surface is the most effective and safest way to prepare a crown for placement with permanent cement.

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