Materials & Techniques Flashcards

Which hyaluronic acid filler property is most associated with resistance to deformation under pressure?

Answer: Cohesivity

Cohesivity refers to the cross-linked gel's ability to maintain shape and resist fragmentation under mechanical stress.

Calcium hydroxylapatite (CaHA) fillers differ from hyaluronic acid fillers primarily because they:

Answer: Stimulate neocollagenesis over time

CaHA microspheres act as a scaffold that stimulates fibroblasts to produce new collagen, providing biostimulatory effects beyond initial volume.

When reconstituting botulinum toxin type A, which diluent is universally recommended?

Answer: Bacteriostatic normal saline

Bacteriostatic normal saline (0.9% NaCl with benzyl alcohol) is preferred because benzyl alcohol provides mild anesthesia and preserves the toxin.

The 'fern pattern' technique in thread lifting refers to:

Answer: Placement of barbed threads in a branching configuration

The fern pattern describes deploying barbed threads in diverging directions from a single entry point to maximize tissue lifting coverage.

Which characteristic distinguishes a biphasic HA filler from a monophasic one?

Answer: Biphasic fillers contain two cross-linked HA phases mixed together

Biphasic fillers consist of distinct cross-linked HA particles suspended in a non-cross-linked HA carrier gel, giving different lift and spreadability properties.

Poly-L-lactic acid (PLLA) biostimulator requires multiple treatment sessions primarily because:

Answer: Its collagen-stimulating effect builds gradually over months

PLLA triggers a delayed fibroblast response, so collagen production accumulates progressively, requiring staged treatments 4–6 weeks apart.

In the context of dermal fillers, 'G prime' (G') measures:

Answer: The elastic stiffness or firmness of the gel

G prime is the storage modulus representing the gel's elastic stiffness, which determines its lift capacity and resistance to dynamic movement.