PDO Threads / Thread Lift / Silhouette Soft
Biodegradable PDO (polydioxanone) sutures are inserted under the skin using a fine needle or cannula. Barbed threads physically reposition sagging tissue while smooth threads create a collagen-stimulating scaffold that rejuvenates skin texture.
How it works
Barbed PDO threads grip sagging tissue and mechanically reposition it superiorly. The foreign body response to PDO insertion triggers controlled inflammation → fibroblast activation → new collagen deposition around each thread. As threads dissolve over 6–8 months, the collagen infrastructure they stimulated remains for up to 18 months. Smooth threads (monofilaments) stimulate neocollagenesis without mechanical lifting.
Reported benefits
- Non-surgical facelift and jowl repositioning
- Brow lift without surgery
- Neck skin tightening
- Nasolabial fold softening
- Jawline definition
- Skin texture and glow improvement (smooth threads)
- Body skin tightening (knees, arms, abdomen)
Regulatory status
Approved for: Non-surgical facial lifting, Skin tightening
PDO threads CE-marked as Class III medical devices (absorbable implants). Widely practiced across EU. Silhouette Soft and multiple PDO thread brands CE-approved.
Approved for: Non-surgical face lifting, Skin repositioning
PDO threads registered as Class III medical devices with MHRA. Considered a medical procedure requiring appropriately trained practitioners. Included in the Health and Care Act 2022 licensing framework.
Approved for: Temporary implants for facial aesthetic improvement, Non-surgical lifting
PDO thread sutures FDA 510(k) cleared as temporary absorbable surgical sutures. Used for face lifting. Silhouette Soft threads have specific FDA clearance. Classified as Class II medical devices.
Practical details
Frequency: Once; may repeat after 12–18 months
Results last: Immediate lifting effect; collagen benefits build over 3–6 months; total duration 12–18 months
Contraindications:
- Active infection, acne or inflammation at treatment site
- Autoimmune conditions
- Blood thinning medications
- Unrealistic expectations (threads are subtle; not equivalent to a surgical facelift)
- Very thin skin with little subcutaneous tissue
Always consult a licensed medical professional before undergoing any treatment. This information is educational only and does not constitute medical advice.