Thread lift principles: you only need to understand two things

The principle of thread lifting is actually summarized in two sentences. First, placing threads with barbs on the surface inside the skin to physically pull up the sagging tissue. Second, as the threads stimulate the tissue, they induce collagen regeneration to hold onto elasticity even as time passes. In other words, the "immediate lifting effect" and the "slow plumping effect" are both contained in a single procedure.

That is why thread lifting is not a battle of how many threads are inserted. Which layer, in which direction, and where they are anchored makes all the difference in the results. In this article, we will calmly break down why thread lifting is effective, how thread materials and structures differ, and which types of sagging it is suitable for.

🧵 What is Thread Lifting?

Thread lifting is a non-surgical lifting procedure that inserts absorbable threads under the skin to pull sagging tissue and simultaneously stimulate collagen production. Because the threads are inserted with a thin needle (cannula) without incisions, the recovery is relatively fast.

The procedure is performed under local anesthesia and takes approximately 20 to 60 minutes, including anesthesia. Recovery reactions such as swelling or bruising often subside within 3 to 14 days in most cases.

The key is the insertion location. The threads are mainly positioned in the subcutaneous fat layer, spanning the upper part of the SMAS (superficial muscular aponeurotic system). Since this layer is the anatomical foundation that supports facial sagging, it dictates the directionality and holding power of the lift.

📌 Key Summary: Thread lifting is a non-surgical lift that inserts threads without incisions to pull sagging tissue and induce collagen regeneration.

⚙️ How Thread Lifting Works: Two Mechanisms

The effects of thread lifting are divided into two stages along a timeline.

First is immediate physical traction. Inserting cog threads, which have microscopic barbs on their surface, allows these barbs to catch and grip the tissue like hooks. The moment the threads are pulled, the sagging cheeks and jawline are lifted upward. This effect is what is immediately visible in the mirror right after the procedure.

Second is the long-term effect of collagen regeneration. When threads enter the tissue, our body perceives this as a healing signal. At this time, fibroblasts are activated, promoting the synthesis of collagen and elastin. This response creates new supporting tissue around the threads.

Therefore, the effect continues to some extent even after the threads are fully dissolved. The lift does not immediately return to square one just because the threads have disappeared; rather, the regenerated collagen holds onto elasticity for a certain period.

📌 Key Summary: Thread lifting operates through two forces: immediate traction from cog threads and collagen regeneration driven by fibroblast activation.

🔬 3 Thread Materials: Differences between PDO, PLLA, and PCL

Absorbable threads have different rates of degradation in the body and differing intensities of collagen stimulation depending on the material. What is important to note here is that the 'degradation period' and the 'duration of effect' are not the same thing.

PDO is well-proven for safety and is frequently chosen as the baseline, while PLLA or PCL is considered if longer retention or stronger collagen stimulation is desired. Rather than one being unconditionally better than the other, the combination varies depending on the facial condition and goals.

📌 Key Summary: PDO (6–8 months), PLLA (12–18 months), and PCL (18–24+ months) differ in their degradation speeds and collagen stimulation intensities.

📐 Cog Threads vs. Mono Threads: What's the Difference?

Threads are also categorized by shape because their purposes are entirely different.

Cog threads are lifting-specific structures designed to catch and pull tissue using surface barbs. They play the role of actually lifting sagging cheeks and jawlines. Depending on the barb shape, they are further classified into molding cogs (barbs molded with a die), cone threads (cone structures used for the mid-face), and spiral threads.

On the other hand, mono threads have no barbs, so their pulling power is weak, but they are used for collagen induction and skin texture improvement. They are intended to refine the overall texture of the skin by being placed closely together like a net.

The depth of insertion also dictates the results. If it is too shallow, the threads may show through or cause dimples (skin indentations), and if it is too deep, the risk of nerve and blood vessel damage increases. This is why the hands that can accurately read the layers are crucial.

📌 Key Summary: Cog threads are for pulling and lifting, while mono threads are for collagen induction and skin texture improvement, serving different purposes.

🆚 How does it differ from HIFU, RF, and Fillers?

Lifting-related procedures are both substitutes and complements to one another. Each has its own area of strength.

• HIFU (High-Intensity Focused Ultrasound): A non-invasive method that focuses heat energy into deep layers to induce collagen regeneration.

• Radiofrequency (RF) Lifting: Stimulates collagen in the dermal layer with heat, with strengths in skin elasticity and tightening.

• Fillers: Used to fill lost volume, often combined with thread lifting to address both sagging and volume simultaneously.

• Thread Lifting: The core is the physical traction that immediately pulls sagging tissue.

For mild to moderate sagging, thread lifting fits well as a fast-recovering intermediate option. For very severe sagging, surgical alternatives (facelifts) are sometimes discussed, but since the recovery period and burden differ, a decision suited to one's condition is required. Onlif prioritizes improvement through non-surgical procedures from a dermatological perspective rather than incisional surgery.

One thing to watch out for. High-heat procedures like HIFU can accelerate the degradation of threads, so it is recommended to avoid combined procedures for at least 2 months after a thread lift.

📌 Key Summary: Thread lifting's strength lies in immediate traction, making it a fast-recovering non-surgical choice suitable for mild to moderate sagging.

🌿 What makes Onlif Thread Lifting different?

Onlif's approach is clear. Instead of inserting a massive number of threads to pull blindly, we place them delicately in the precise location. It is the perspective that design comes before the number of threads.

Onlif approaches this with a quadruple correction method that considers the characteristics of each layer, including the muscle layer, SMAS layer, subcutaneous fat, and skin. Since each layer plays a different role, they are managed and treated separately accordingly.

Directional design, or **Lifting Vectors**, is also adjusted according to the face shape. For instance, wide cheekbones are lifted naturally in a vertical direction, severe sagging is lifted powerfully in a diagonal direction, and excess volume is redistributed in the reverse direction.

Added to this is the concept of Harmony Balance, which balances the ratio of the lifting section to the anchoring section, aiming to maximize the effect while reducing any displacement. Our Physician Specialty System, where doctors only handle the procedures they excel at most, is also the foundation of this level of delicacy.

The aesthetic that Onlif pursues is not plastic surgery that alters your eyes, nose, or mouth. It is a natural, non-excessive improvement that clears away the sagging and loss of elasticity that obscure your inherent beauty. It is especially well-suited for those who:

• Are concerned about sagging cheek fat and double chin lines

• Want an immediate lifting effect

• Felt that laser lifting alone fell short

• Want a natural line without the burden of incisions

📌 Key Summary: Onlif thread lifting is characterized by quadruple correction and vector design, prioritizing the layout of location, layer, and direction over the mere quantity of threads.

⚠️ Side Effects and Post-Procedure Precautions

As thread lifting is a medical procedure, reactions and potential side effects exist. Representative examples include dimpling (skin depression or unevenness), asymmetry, infection, and thread exposure. Many of these depend heavily on the insertion layer and vector design—namely, the skill level of the practitioner.

In one study (involving 61 subjects), infection was reported at 31.2%, post-procedure dissatisfaction at 23%, paresthesia at 19.7%, and skin dimpling at 16.4%. Since this is retrospective data with a small sample size, it is more appropriate to view it as a reference for possibilities rather than as absolute values.

Conversely, in a survey of experienced patients in their 40s to 60s, 63.9% (11.8% very satisfied + 52.1% satisfied) answered that they were satisfied with the results, and recently, procedures among those in their 20s and 30s have also increased, expanding to about 46% of the total.

After the procedure, it is best to avoid opening your mouth excessively wide, receiving strong massages, visiting saunas, and doing strenuous exercise for a certain period. For medications with anticoagulant effects such as aspirin, warfarin, high-dose omega-3, and vitamin E, please consult with the medical staff about adjusting your dosage before the procedure.

📌 Key Summary: Possibilities of dimpling, infection, and asymmetry exist, and the results depend greatly on the procedure design and aftercare.

❓ Frequently Asked Questions (FAQ)

Does the lifting effect disappear completely once the threads dissolve?

No. Even after the threads degrade, the collagen regenerated during that process holds onto elasticity for a certain period. However, individual differences are significant, and the duration of the effect varies depending on the degree of sagging.

Which thread should I choose among PDO, PLLA, and PCL?

There is no single correct answer. PDO is widely used as a baseline due to its extensive safety data, while PLLA or PCL is considered if you want longer retention or stronger collagen stimulation. Since the combination varies depending on your facial condition and goals, it is best to decide during a consultation.

A dimple (skin indentation) formed after the procedure. Will it go away naturally?

Mild, early-stage indentations often ease as swelling subsides and the threads settle into place. However, if the indentation persists or is distinct, you should not leave it unaddressed; instead, have your condition evaluated at the clinic where you received the procedure.

Can I receive HIFU or RF lifting after a thread lift?

High-heat procedures can accelerate the degradation of threads, so it is recommended to avoid combining them for at least 2 months after a thread lift. Be sure to consult with your medical provider regarding the order and intervals of combined treatments.

I have a lot of heavy cheek fat. Can I still expect results?

The heavier the tissue, the greater the burden placed on the threads, making the design of the insertion layer and anchoring method more important than the mere number of threads. Depending on the degree of sagging, combining it with other procedures may be advantageous, so a diagnosis is necessary.

Can men receive thread lifting as well?

Yes, it is possible. However, since men generally have thicker skin and different distributions of subcutaneous fat and muscle, the choice of threads and vector design are often approached differently compared to women.