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 silicone characteristic is most critical when selecting material for an auricular prosthesis in a patient who lives in a high-humidity coastal environment?
Answer: Excellent hydrolytic stability
Hydrolytic stability ensures the silicone resists degradation when repeatedly exposed to moisture, salt air, and perspiration.
A nasal prosthesis margin that lifts away from the skin within weeks is most likely caused by:
Answer: Adhesive incompatibility with the silicone formulation
Many silicone adhesives are formulated for specific silicone types; using an incompatible adhesive causes premature margin failure.
When fabricating a mold for an orbital prosthesis using dental stone, which layer is applied first to capture fine surface detail?
Answer: Thin wash of low-viscosity impression material or die stone
A thin wash of low-viscosity material captures the finest anatomical detail before bulk is added with subsequent layers.
Intrinsic colorants in medical-grade silicone prostheses must be:
Answer: Non-leaching, biocompatible pigments
Colorants must be biocompatible and non-leaching to prevent skin sensitization and maintain color integrity over time.
During wax pattern carving for a nasal prosthesis, the anaplastologist should reference the patient's:
Answer: Pre-operative photographs and contralateral anatomy
Pre-operative photos and the patient's own contralateral anatomy provide the most individualized and accurate morphological reference.
What is the primary function of a silicone thinner (diluent) added during prosthesis fabrication?
Answer: Reduce Shore A hardness and increase flow
Silicone diluents lower durometer and viscosity, allowing fabrication of softer, more lifelike margins and improved movement.
A patient presents with a mid-face maxillary defect requiring an obturator prosthesis that also restores external facial contour. This combined restoration is called a:
Answer: Maxillofacial prosthesis with extraoral component
A maxillofacial prosthesis with an extraoral component addresses both the intraoral void and the external soft-tissue deficiency simultaneously.