Materials & Techniques Flashcards
7 cards from real FAC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Materials & Techniques flashcards as text
In rhinoplasty using non-surgical fillers, which anatomical danger zone demands the highest caution due to risk of vision loss?
Answer: Nasion (radix)
The radix/nasion area communicates with ophthalmic arterial branches; retrograde embolism here can travel to the retinal artery, causing blindness.
Which property of a filler determines how far it will spread from the injection point in soft tissue?
Answer: Viscosity (η*)
Complex viscosity (η*) governs flow behavior; lower viscosity products spread more readily, while higher viscosity products remain more localized.
The recommended storage temperature for unopened botulinum toxin type A vials is:
Answer: 2–8°C (standard refrigeration)
Botulinum toxin A products must be stored refrigerated at 2–8°C to maintain potency; freezing or heat exposure degrades the protein.
Autologous platelet-rich plasma (PRP) used in facial rejuvenation works primarily by:
Answer: Releasing growth factors that stimulate fibroblast activity and collagen synthesis
PRP concentrates platelets that degranulate upon activation, releasing PDGF, TGF-β, VEGF, and EGF to promote tissue regeneration and neocollagenesis.
The 'serial puncture' injection technique differs from 'bolus' injection in that serial puncture:
Answer: Places multiple small aliquots at evenly spaced points along a line
Serial puncture creates a row of small, evenly spaced deposits that collectively fill a line or area with more precision and less risk of focal overcorrection than a single bolus.
Tyndall effect in filler patients presents as:
Answer: A bluish discoloration visible through thin skin where filler is too superficial
The Tyndall effect occurs when light scatters off superficially placed HA particles beneath translucent skin, producing a blue-grey hue.
Which of the following best describes the mechanism behind PDO thread biostimulation?
Answer: Controlled foreign body response to degrading PDO induces fibroblast collagen production
As PDO (polydioxanone) threads degrade over 4–6 months, the mild inflammatory foreign body reaction recruits fibroblasts that deposit new collagen around the thread tract.