Linear Threading Technique
An injection method in which filler is deposited in a continuous line along a cannula or needle tract as the instrument is withdrawn.
Full Definition
The linear threading technique is a standard filler injection method whereby the needle or cannula is advanced to the distal point of the intended treatment area, and filler is deposited in a continuous retrograde thread as the instrument is slowly withdrawn. This creates an even column of product along the treatment vector. Variations include anterograde threading, where product is deposited on the forward pass. Editors should verify whether an author specifies 'retrograde' or 'anterograde' linear threading, as these are meaningfully distinct sub-techniques. The term should not be conflated with the 'bolus technique,' which deposits product at a single point.
Usage
Usage note: Specify the direction (retrograde vs anterograde) wherever clinically relevant. Do not abbreviate to 'threading' without prior definition in a document.
In Context
- "The procedural note specified use of the linear threading technique along the nasolabial fold using a 27-gauge needle." — Treatment record
- "Figure 3 illustrates the linear threading technique compared with the serial puncture approach." — Instructional textbook