Prosthetic Fabrication & Fitting Flashcards
7 cards from real CCA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Prosthetic Fabrication & Fitting flashcards as text
Which retention method for a silicone auricular prosthesis relies on direct bone-anchored implants placed by a surgeon?
Answer: Osseointegrated implants with bar/clip attachments
Osseointegrated implants placed in the temporal bone allow bar-and-clip or magnet retention systems that eliminate the need for skin adhesives.
During the wax try-in stage for a nasal prosthesis, the primary purpose is to:
Answer: Evaluate form, fit, symmetry, and patient acceptance before processing
The wax try-in allows the anaplastologist and patient to assess shape, margins, symmetry, and color harmony before committing to final processing.
Intrinsic coloring of a silicone prosthesis refers to:
Answer: Incorporating pigments into the silicone base before vulcanization
Intrinsic coloring embeds pigments within the silicone mass so color is durable and cannot be rubbed off, unlike extrinsic surface painting.
A two-part rigid stone mold for a silicone prosthesis must be sealed with a separating medium primarily to:
Answer: Prevent mold sections from bonding to each other and to the silicone
Separating medium (e.g., petroleum jelly or alginate separator) prevents adhesion between mold halves and between mold and silicone, enabling clean separation.
When fabricating an ocular prosthesis, the iris disc is typically positioned to match the patient's contralateral eye primarily by aligning:
Answer: Pupil center relative to the geometric center of the prosthesis and overall iris diameter
Accurate placement of the pupil center and correct iris diameter are the primary factors for achieving natural-appearing gaze alignment in an ocular prosthesis.
The Shore A hardness scale is used in anaplastology to characterize:
Answer: The durometer (softness-to-firmness) of silicone elastomers
Shore A durometer measures the hardness of elastomers; lower values indicate softer, more flexible silicone appropriate for lifelike facial prostheses.
Feathered margins on a silicone facial prosthesis are achieved by:
Answer: Designing the wax pattern with extremely thin, tapered edges at the border
Creating very thin, tapered wax margins transfers to ultra-thin silicone edges on the finished prosthesis, blending imperceptibly with surrounding skin.