CCA Techniques & Materials 2

Question 1

Which intrinsic coloring technique involves mixing pigments directly into silicone before vulcanization?

Accepted Answer

Intrinsic pigmentation

Answer

Intrinsic pigmentation blends colorants into the silicone matrix prior to curing, producing durable color that resists wear and weathering.

Question 2

When fabricating a silicone auricular prosthesis, which catalyst system is most commonly used for room-temperature vulcanization?

Accepted Answer

Tin catalyst

Answer

Tin (condensation) catalysts are the classic choice for RTV silicone systems used in anaplastology, though platinum-cure systems are increasingly popular for their lower shrinkage.

Question 3

A marginal edge of a silicone prosthesis that is too thick will most likely cause which problem?

Accepted Answer

Visible color mismatch at the transition zone

Answer

Thick margins create a visible step that does not blend into surrounding skin, producing a color and contour mismatch that betrays the prosthesis.

Question 4

In prosthetic eye fabrication, which material is typically used for the scleral shell?

Accepted Answer

Heat-cured polymethyl methacrylate (PMMA)

Answer

PMMA (acrylic) is the standard material for ocular prostheses due to its biocompatibility, optical clarity, and ability to be polished to a high gloss.

Question 5

Which adhesive is preferred for silicone facial prostheses because it is water-resistant and skin-safe?

Accepted Answer

Medical-grade silicone adhesive

Answer

Medical-grade silicone adhesives bond effectively to silicone prostheses, resist perspiration, and are formulated to minimize skin irritation.

(CCA) Certified Clinical Anaplastologist Practice Test

(CCA) Certified Clinical Anaplastologist Practice Test

CCA Techniques & Materials 2