PDO Thread Lifts

What is actually happening

A polydioxanone thread is a dissolving suture with barbs or cones along it. It is passed through the subcutaneous tissue and pulled, so the barbs catch tissue and hold it in a slightly higher position. The thread itself dissolves over about six months, and the argument for a longer-lasting effect is that the fibrous reaction around it leaves behind some collagen.

What the evidence supports

The systematic review that covers this best pooled twelve studies and 818 patients. Scores improved immediately after the procedure on every scale used. The longest follow-up anywhere in it was two years, and its own conclusion is that long-term efficacy data are lacking.

Three things come up consistently. There is a real immediate effect, and it is what fills the marketing. The effect decays quickly — most series report meaningful loss of the lift by three to six months. And satisfaction is highest in exactly the group with the least to gain: young patients with mild laxity and good skin.

Why the mechanism limits it

Descent happens because the retaining ligaments allow the soft tissue to fall. A thread does not address a ligament. It creates a temporary suspension point in tissue that is still tethered where it always was, and it is asked to hold that suspension against gravity, chewing, sleeping and facial expression with a suture designed to disappear.

When patients are happy, it is usually because they did not have a significant problem to begin with, or because they liked the swelling in the first few weeks and read it as a lift.

What I find in the operating room

This is the part that does not appear in any of the papers, and it is the reason my answer is a flat no.

When I operate on someone who has had threads placed, I fairly often come across tethering, scar tissue, or an actual fragment of thread inside the deep plane. That tells me the provider was working in a layer they should never have been in. Threads are sold as a superficial, minimally invasive procedure, and finding their remains below the SMAS means the needle went somewhere a blind pass has no business going — the same layer that carries the facial nerve.

I have not personally seen a nerve injury from threads. I have seen enough foreign material and scarring in that plane to call the risk real, and it is being taken on by patients who were told this was a lunchtime alternative to surgery.

It does not usually stop me operating. It makes the operation more careful, and occasionally more difficult, because I am working through something I did not put there.

What actually goes wrong

Dimpling where a barb has caught tissue it should not have. Extrusion of a thread through the skin. Asymmetry when one side holds and the other does not. Infection, bruising and swelling at the entry points. Most of it settles. Some of it needs the thread removed, which is harder than placing it was.

The honest summary

The reason threads keep coming back into fashion has nothing to do with the evidence. Patients want a result and do not want surgery, and threads are marketed straight into that gap: you are in a chair, you get two numbing injections, and someone tells you your face is being lifted. It is an appealing story and an incorrect one.

If someone is in their thirties with very early laxity and goes to a genuinely skilled injector, I would not argue with them. I would still never recommend it. For anyone being offered threads instead of a facelift, the question worth asking is what happens to the retaining ligaments — and the answer is nothing, which is why the result behaves the way it does.