CDC Prosthetics Design & Fabrication 3

Question 1

Which type of pontic design provides the BEST esthetics for anterior fixed partial dentures while still allowing adequate cleaning?

Accepted Answer

Ovate pontic

Answer

The ovate pontic fits into a prepared tissue depression, creating natural-looking emergence and allowing cleaning with floss.

Question 2

Internal porosity in a cast metal framework is MOST commonly caused by:

Accepted Answer

Shrinkage porosity from rapid metal solidification without sufficient reservoir

Answer

Shrinkage porosity occurs when the metal solidifies too quickly without an adequate sprue/reservoir to feed molten metal into the shrinking casting.

Question 3

A ceramist is layering feldspathic porcelain onto a lithium disilicate coping. Which step is critical before applying body porcelain?

Accepted Answer

Sandblasting, cleaning, and applying appropriate ceramic adhesion liner per manufacturer instructions

Answer

Lithium disilicate copings require surface preparation and often a liner/wash firing to promote porcelain adhesion and achieve desired final shade.

Question 4

When evaluating occlusal contacts on a finished prosthesis, a 'shimstock' (8 µm foil) is used to:

Accepted Answer

Detect the presence and holding force of occlusal contacts

Answer

Shimstock held between opposing teeth and tugged indicates whether a contact is present and whether it is light or heavy based on resistance to removal.

Question 5

The dental term 'emergence profile' in prosthetic design refers to:

Accepted Answer

The contour of a restoration from the gingival sulcus to the height of contour

Answer

Emergence profile describes the three-dimensional contour of a restoration as it exits the gingival sulcus, influencing tissue health and esthetics.

(CDC) Certified Dental Ceramist Practice Test

(CDC) Certified Dental Ceramist Practice Test

CDC Prosthetics Design & Fabrication 3