CCA Impression Techniques & Molding 2

Question 1

Which impression material is most appropriate for capturing fine surface detail on a hairless scalp area for a cranial prosthesis?

Accepted Answer

Vinyl polysiloxane (VPS)

Answer

Vinyl polysiloxane provides superior dimensional stability and captures fine detail with minimal distortion, making it ideal for cranial prosthetic impressions.

Question 2

What is the primary reason a two-part (matrix and core) mold is used for complex auricular prostheses?

Accepted Answer

To allow removal of undercut areas without tearing the prosthesis

Answer

A two-part mold allows the anaplastologist to demold prostheses with undercuts without distortion or tearing of the silicone material.

Question 3

When taking a facial impression for an orbital prosthesis, the patient's eye should be:

Accepted Answer

Closed with a protective conformer or gauze in place

Answer

A protective conformer or gauze shields the orbital cavity and remaining ocular structures from impression material during the procedure.

Question 4

What does the term 'working time' refer to in the context of impression materials?

Accepted Answer

Time available to manipulate the material after mixing before it begins to set

Answer

Working time is the window during which the clinician can seat, adapt, and position the impression material before gelation or polymerization begins.

Question 5

Which type of separator (release agent) is most commonly applied to stone or plaster molds before packing intrinsic silicone?

Accepted Answer

Silicone mold release spray

Answer

Silicone-specific mold release agents prevent adhesion between cured silicone and the mold surface without interfering with color or cure.

(CCA) Certified Clinical Anaplastologist Practice Test

(CCA) Certified Clinical Anaplastologist Practice Test

CCA Impression Techniques & Molding 2