Facial Prosthetics Design & Fabrication 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 Facial Prosthetics Design & Fabrication flashcards as text
Which impression technique is preferred for capturing a deep orbital exenteration defect with significant undercuts?
Answer: Sectional or staged polyvinyl siloxane impression
Sectional PVS impressions allow removal from severe undercuts without distortion by disassembling the impression in segments.
Bar-clip retention for an implant-retained auricular prosthesis requires a minimum inter-implant distance of approximately:
Answer: 18–20 mm
A minimum of approximately 18–20 mm between implants is needed to accommodate bar components and clips without mechanical interference.
When painting extrinsic colors on a cured silicone prosthesis, the medium most compatible with platinum-cured silicone is:
Answer: Silicone-dissolved pigment in uncured silicone base
Silicone-compatible extrinsic paints use an uncured silicone carrier that bonds chemically to the cured prosthesis surface.
During the flasking and packing of a silicone auricular prosthesis, flash overflow between mold halves should be:
Answer: Removed before final closure to prevent thin margins
Removing flash before final closure ensures the mold seats fully, preventing material-thin areas and producing accurate margins.
The term 'feathered edge' in facial prosthetics refers to:
Answer: An extremely thin, tapered margin that blends imperceptibly into surrounding skin
A feathered edge tapers to near-zero thickness at the margin, minimizing visible transition between prosthesis and natural skin.
A patient with a silicone nasal prosthesis reports yellowing of the device after 8 months. The most likely cause is:
Answer: UV degradation and oxidative aging of the silicone polymer
Ultraviolet radiation and oxidative exposure cause progressive yellowing and embrittlement of silicone prostheses over time.
Which landmark is used to establish the vertical midline when positioning a nasal prosthesis on the face?
Answer: Glabella-to-menton facial midline
The glabella-to-menton line establishes true facial midline and is the primary reference for symmetrical nasal prosthesis placement.