Retrograde Injection: The Retrograde Filler Technique
Retrograde injection, or the retrograde technique, is the term used when the product is deposited while the needle or cannula is being withdrawn, not while it advances. The result is a thread-like deposit along the path, instead of a concentrated point.
The term describes a way of depositing the product, not a procedure in itself. It appears in descriptions of filling folds, contours and borders, as in nasolabial fold filler and in lip border definition.
Why is retrograde injection used?
The most cited rationale is distribution and safety. Depositing during withdrawal tends to spread the product in small amounts along the path, which reduces the chance of large deposits at a single point. Even so, no technique eliminates the risk of vascular occlusion: it also depends on anatomy, plane, volume and pressure, and requires anatomical knowledge and preparation for complications.
What is the difference from other ways of depositing?
- Retrograde injection: linear deposit during withdrawal.
- Anterograde: deposit while the instrument advances.
- Bolus: concentrated deposit at one point.
- Fanning and cross-hatching: combinations of linear paths from a single entry point.
The choice among them is the decision of the qualified professional, after assessment. This page only defines the term: injection technique is learned in supervised hands-on training, not from text.
Also called: retrograde technique, retrograde injection, linear retrograde injection.