Auricular & Nasal Reconstruction 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 Auricular & Nasal Reconstruction flashcards as text
Which facial landmark defines the alar base width of a nasal prosthesis in the average adult, and what is the standard measurement?
Answer: Inner canthal distance, averaging 28–32 mm
The alar base width in average adults approximates the inner canthal distance, typically 28–32 mm, serving as a reliable proportional guide for nasal prosthesis sizing.
When taking an impression for an auricular prosthesis with osseointegrated implants in place, which impression technique is used to record implant positions accurately?
Answer: Open-tray implant impression with transfer copings secured to the abutments
An open-tray impression with transfer copings captures the precise three-dimensional relationship of each abutment so the bar and retention components can be fabricated accurately.
A patient requires a nasal prosthesis following Mohs surgery that removed the left ala only. What is the most appropriate fabrication approach?
Answer: Partial alar prosthesis sculpted to mirror the contralateral ala
A partial alar prosthesis mirroring the contralateral intact ala provides the most precise anatomical restoration with minimal unnecessary coverage.
Which type of magnet coupling system is most commonly used in implant-retained auricular prosthetics due to its corrosion resistance and field strength?
Answer: Neodymium iron boron magnets with gold alloy keeper
Neodymium iron boron magnets with gold alloy or titanium keepers provide the highest field strength-to-size ratio and are encapsulated to prevent corrosion in the moist periauricular environment.
During nasal prosthesis fabrication, what is the purpose of building an internal armature or substructure within the silicone body?
Answer: To maintain the three-dimensional shape of the prosthesis and resist deformation during wear
An internal armature, often made from acrylic or nylon mesh, maintains the nasal prosthesis shape under the compressive forces of daily wear and facial animation.
Which surface finishing technique applied to a silicone auricular prosthesis best reduces light reflection that reveals prosthetic edges in outdoor lighting?
Answer: Matte surface texturing using a salt or sugar press-on technique
Pressing salt or sugar into the uncured silicone surface and dissolving it post-cure creates a micro-textured matte finish that scatters light and reduces prosthetic edge detection.
What is the recommended follow-up interval for prosthesis replacement due to material degradation in a patient who uses medical adhesive daily for auricular prosthesis retention?
Answer: Every 1–2 years
Daily adhesive application and removal, UV exposure, and mechanical stress typically degrade silicone auricular prostheses within 1–2 years, necessitating replacement.