Cannula or Needle
A skilled injector should feel at ease utilising both microcannulas and needles because each has benefits and drawbacks, many of which are location-specific for the face.
A blunt tip microcannula is safer in the subcutaneous plane in anatomical hazard zones, but it should still be handled with care. Long microcannulas can be used to gently break up creases and scars or contour huge surface regions with no pain, stress, or bruising.
There is a learning curve with microcannulas because they need a needle to enter the skin and frequently need a second pair of hands to help.
In most cases, the needle is one or two gauges larger than the microcannula (for example, a trocar measuring 25 gauge for a microcannula measuring 27 gauge for 1.5 inches).
The most popular cannula sizes are 23g 38mm and 23g 50mm or 25g 38mm and 25g 50mm.
How to describe the differences
If you are in a risky place or the area is highly sensitive, use a cannula. It is also beneficial if you wish to lessen the patient’s level of discomfort.
A natural result is produced by the cannula’s delivery of the substance in strands. If you select a needle, it will be subperiosteally administered as a bolus, which can provide significantly more lift.
Although this method is more uncomfortable and carries a larger risk of injecting into an artery, it delivers the product to a particular area.