Needle vs cannula for filler — when do you reach for each?
Building a feel for when a needle beats a cannula and vice versa. How do you decide?
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Both are tools; neither is 'safe' on its own. Needle: more precision and haptic feedback, good for fine/superficial work and depot-on-bone; lower cost; no-touch technique helps infection control. Downsides — genuine risk of intravascular injection and lacerating structures, limited by length/rigidity, more entry points. Cannula: blunt tip REDUCES (does not remove) the risk of intravascular injection and laceration; one entry point, less trauma, wider coverage from a single port. Downsides — less precise, deeper placement can carry its own risk, higher cost. Broad rule of thumb we teach: cannula for larger, more vascular territories where you want to glide past vessels (NLF, marionettes, cheeks, jawline); needle for precise superficial detail and depot-on-bone. Whatever you use — slow, low pressure, small aliquots, aspirate with a needle, and know the anatomy.
- Asher ★ 0
The 'blunt tip reduces but does NOT remove intravascular risk' point matters — I've seen people treat a cannula as a free pass. It isn't. Same slow, low-pressure discipline applies.
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