PDO Thread Lift: Smooth vs Cog Threads, Who Each Suits, and the Risks I Explain First

I'm Dr. Hyunji Kim, director and lead physician at Delphic Clinic in Gangnam, near Sinnonhyeon Station. I trained at Korea University Medical Center and I am a member of the Korean Academy of Aesthetic Surgery & Laser Medicine and the Korean Filler Society. Lifting is the core of my practice, and I plan and place every thread myself, including every PDO thread lift we do.

Patients often write to me asking for a PDO thread lift as if it were one fixed procedure. In fact PDO is the material, and what it does depends on the thread you choose and where it goes. That one misunderstanding is behind many mismatched expectations, so this page is about the threads themselves: types, who suits each, how long they tend to last and the risks I go through before we start.

PDO is the material, not the procedure

Polydioxanone has been used for dissolvable sutures for many years. In a thread lift it is shaped into threads of different designs, and some clinics also use PLLA threads, a different dissolvable material. If you are new to thread lifts in general, the first-timer overview is in my thread lift Korea first-timer guide; here I stay on choosing between PDO thread types.

Smooth, cog and nose threads: what each design is built to do

The procedure takes about 40 to 80 minutes depending on the plan, and most people are back to ordinary activity within one to two days, with some swelling or tightness for longer.

Matching a PDO thread to the face in front of me

• Early jowls and a softening jaw line with decent skin thickness: cog threads are usually the right tool.
• Fine crepiness and dull, thin-feeling skin without real sagging: smooth mono threads make more sense than cogs.
• Deep nasolabial or marionette folds: threads for lift, with a small amount of filler to soften the fold itself.
• A low or flat nose bridge, or a tip that lacks definition: nose threads, which are a separate conversation.

How long a PDO thread lift lasts, framed honestly

The threads dissolve gradually. The visible lift from cog threads is clearest at first and softens as swelling settles and the threads are absorbed, while collagen formed around them helps support the skin for longer. Depending on the type of thread, the improvement in elasticity can last several months or longer. Your age, skin quality, how much sagging you start with and how you move your face all change that number, so I give you an estimate for your own plan, not a promise.

I choose the thread for the face, never the face for the thread. If the thread I have does not suit you, the answer is no thread.— Dr. Hyunji Kim, Delphic Clinic

The risks I explain before the first thread goes in

• Common and short-lived: swelling, bruising, tenderness, and tightness or a pulling feeling when you open your mouth wide or chew.
• Less common: small dimples or puckering at entry or anchor points, mild asymmetry, a thread end you can feel under the skin.
• Uncommon: infection, a thread that works towards the surface, or prolonged discomfort, which need a review and sometimes removal of the thread.

Reviews tend to understate how tight the first days feel and why a lift can look as if it dropped once swelling settles. I unpack both in my post on what thread lift reviewers miss.

Faces I would not thread

• Heavy sagging where threads alone would give a change too small to justify the cost.
• Very thin skin with little fat, where threads can show or cause visible ridges.
• An active skin infection, or a dental procedure or long-haul flight planned within the next day or two.
• Pregnancy, or a patient who needs a dramatic change that only surgery can give.

Copy these thread questions for your consultation

• Which thread type and brand will you use, and why that one for my face?
• How many lines, and where will the entry and anchor points be?
• What should I expect to see on day one, at two weeks, and later?
• Who places the threads, and what happens if I notice a dimple or a thread end?

If you are considering a PDO thread lift, book a free one-to-one consultation. I will look at your skin and sagging, tell you which threads suit you, or that none do, and explain the risks before you decide. English and Chinese interpreters are on site, international patients pay the same price as Korean patients, and we are one minute from Exit 3 of Sinnonhyeon Station.