Screw thread
| Field | Medicine |
|---|---|
| Also known as | spiral thread, tornado thread, double screw
|
Screw threads (spiral / tornado / double-screw) are mono threads coiled around the needle so they occupy a small volume when released. Used in etched nasolabial folds, marionette lines, neck lines — collagen plus a bit of bulk, not a hitch. If the clinic says “screw facelift,” they are selling monos with a twist.