CDC Prosthetics Design & Fabrication 2

Question 1

Which wax technique involves building up contours incrementally using small additions of molten wax to establish axial walls of a dental prosthesis?

Accepted Answer

Additive wax-up technique

Answer

The additive wax-up technique builds form by progressively adding molten wax rather than removing bulk material.

Question 2

When designing a three-unit fixed partial denture, the connector dimensions should typically be at least:

Accepted Answer

4 mm × 4 mm cross-section

Answer

A minimum 4 mm × 4 mm connector cross-section provides adequate strength to resist fracture under occlusal forces in a three-unit FPD.

Question 3

A dental ceramist notices that a PFM crown has metal showing through the incisal ceramic after firing. The MOST likely cause is:

Accepted Answer

Insufficient porcelain build-up thickness over the metal

Answer

Inadequate porcelain thickness allows the underlying metal substrate to remain visible through translucent incisal porcelain.

Question 4

Which occlusal scheme is MOST often recommended for a full-arch implant-supported fixed prosthesis to protect implants from lateral forces?

Accepted Answer

Canine-guided occlusion with posterior disclusion

Answer

Canine-guided occlusion with posterior disclusion distributes lateral forces to the canines and protects posterior implants from damaging off-axis loading.

Question 5

During the lost-wax casting process, the elimination of the wax pattern from the investment mold is accomplished by:

Accepted Answer

Burnout in a furnace at high temperature

Answer

High-temperature burnout in a furnace vaporizes the wax pattern and preheats the mold for molten metal casting.

(CDC) Certified Dental Ceramist Practice Test

(CDC) Certified Dental Ceramist Practice Test

CDC Prosthetics Design & Fabrication 2