CCA Facial Prosthetics Design & Fabrication 3

Question 1

Which impression technique is preferred for capturing a deep orbital exenteration defect with significant undercuts?

Accepted Answer

Sectional or staged polyvinyl siloxane impression

Answer

Sectional PVS impressions allow removal from severe undercuts without distortion by disassembling the impression in segments.

Question 2

Bar-clip retention for an implant-retained auricular prosthesis requires a minimum inter-implant distance of approximately:

Accepted Answer

18–20 mm

Answer

A minimum of approximately 18–20 mm between implants is needed to accommodate bar components and clips without mechanical interference.

Question 3

When painting extrinsic colors on a cured silicone prosthesis, the medium most compatible with platinum-cured silicone is:

Accepted Answer

Silicone-dissolved pigment in uncured silicone base

Answer

Silicone-compatible extrinsic paints use an uncured silicone carrier that bonds chemically to the cured prosthesis surface.

Question 4

During the flasking and packing of a silicone auricular prosthesis, flash overflow between mold halves should be:

Accepted Answer

Removed before final closure to prevent thin margins

Answer

Removing flash before final closure ensures the mold seats fully, preventing material-thin areas and producing accurate margins.

Question 5

The term 'feathered edge' in facial prosthetics refers to:

Accepted Answer

An extremely thin, tapered margin that blends imperceptibly into surrounding skin

Answer

A feathered edge tapers to near-zero thickness at the margin, minimizing visible transition between prosthesis and natural skin.

(CCA) Certified Clinical Anaplastologist Practice Test