How Jamber Threads Fill Hollowed Volume, and Why Each Dissolving Thread Grips Tissue Differently

When people hear "thread lift," they usually picture sagging skin being pulled up. But more and more threads are now used the opposite way, to fill in hollow areas like the nasolabial folds or under the eyes where volume has simply been lost. Jamber thread is one of them.

Jamber thread looks nothing like a traditional cog thread. There are no hook-shaped barbs on the surface. Instead, the thread itself is wound tightly like a spring. Let's walk through why this shape matters and how it grips tissue differently from other dissolving threads.

What Kind of Dissolving Thread Is Jamber?

Jamber thread is made of PDO (polydioxanone, a medical thread material that breaks down naturally in the body and is also used in surgical sutures). Its defining feature is that the thread itself is coiled tightly, like a spring.

Because of this shape, a single thread takes up real volume once inserted. A tightly coiled spring occupies far more space than a plain strand, so when it's placed into a hollow area like the cheek or under-eye, it physically fills that empty space on its own. In that sense, the thread isn't so much pulling tissue as settling into place and occupying it.

This spring structure is built on a similar principle to what's often called a screw thread or tornado thread, where one or two fine strands are twisted into a spiral. Rather than bundling tightly, the spiral leaves small gaps between the coils. Those gaps matter later, because they're exactly where surrounding tissue can grow in and anchor the thread.

How the Spring Structure Grips Tissue

Cog threads work by using hook-shaped barbs to catch tissue and pull it upward. Jamber thread works differently. Instead of barbs, the spiral shape of the thread itself wraps around the surrounding tissue in three dimensions.

Think of coiling a spring around your finger. Even without pulling, the spring stays snugly in place because it wraps all the way around. Jamber thread works the same way: fat and connective tissue grow into the gaps between the coils, so the thread and the tissue become interlocked. The direction of the grip is the key difference. A cog thread pulls in one direction, while Jamber thread holds from all sides at once.

Because of this, Jamber thread is better suited to supporting tissue in place than to pulling it strongly upward. That's also why it tends to work better for filling hollow areas than for lifting sagging ones.

How Is This Different from How Cog Threads Catch?

The barbs on a cog thread's surface are designed to slide in smoothly one way and catch when pulled the other way, the same principle as a fishhook's barb. As those barbs grip the tissue and get pulled, sagging skin is drawn upward along with them.

That mechanism produces strong pulling force, but it has a limitation: the barbs only catch tissue at scattered points along the thread. Jamber thread, without barbs, has its entire spiral surface in contact with tissue, not just a few catch points but the whole length the thread travels through.

That's why cog threads excel at pulling force along a line, while Jamber threads excel at building volume through broad surface support. Which one gets used often comes down to whether the goal is lifting a sagging line or filling a hollowed area, and that difference traces straight back to their structure.

What Happens as the Thread Dissolves

Like other PDO threads, Jamber thread gradually breaks down in the body into water and carbon dioxide. This process is reported to take roughly 6 months.

While the thread dissolves, the body treats it as a foreign material and mounts a healing response around it, similar to how the body kicks into repair mode after an injury. Small inflammatory and repair reactions unfold along the path of the thread, drawing in fibroblasts, the skin's own collagen-producing cells.

This is where the spring structure plays a second role. Because collagen settles along the broad surface area between the coils, it's described as filling in not as a thin line but as a somewhat voluminous band that follows the thread's path. That's why some texture remains in the area even after the thread has fully dissolved.

Why It Suits Hollowed Areas So Well

In areas like the nasolabial folds, under the eyes, or the temples, where the skin thins out and hollows over time, volume loss is often the real issue rather than sagging. There simply isn't enough tissue left to pull up, which makes it hard for a barb-based cog thread alone to produce a natural result.

Jamber thread is described as better suited to these areas because it builds its own volume rather than pulling existing tissue. The spring structure already has some thickness on its own, and as collagen fills in around it, the hollow area gradually fills out.

That said, how much volume actually returns depends heavily on how hollow the area was to begin with, along with the number of threads used and how deep they're placed. So it's difficult to promise a specific number or volume of improvement.

For the same reason, thin, sensitive areas like under the eyes require extra care in choosing the depth and direction of the threads. The thinner the skin, the more the spring's own thickness can show through the surface, so selecting the right thickness and count for the area has a real impact on the final result.

When It's Combined with Other Treatments

Jamber thread is often planned alongside other treatments rather than used on its own. Some common combinations include:

• With filler: Filler provides immediate volume right after treatment, while Jamber thread builds supporting structure underneath. Filler shows volume from the start but gradually gets absorbed over time, while the thread slowly builds collagen that adds longer-lasting support.
• With cog thread: Sagging areas get lifted with cog thread, while hollowed areas get filled with Jamber thread, mixing thread types by area. Since the two threads grip in different directions and serve different purposes, trying to solve every area with just one thread type can end up looking unnatural.
• With RF treatments: Jamber thread is sometimes paired with RF treatments that improve the skin's own elasticity. While Jamber thread builds volume and support in the deeper layer, RF works on elasticity closer to the surface at the same time.

Which combination fits best depends on how much hollowing and sagging is present, along with age and skin condition, so this is usually worked out through a consultation.

What to Keep in Mind During Recovery

A few precautions are recommended while the thread is settling into place early on.

• For the first few days after treatment, avoid strong pressure or massage on the area. The spring structure hasn't fully interlocked with the tissue yet, so firm pressure can shift the thread out of position.
• Swelling and bruising typically settle down over time, though recovery speed varies by area and by individual.
• Hot saunas or steam rooms are best avoided early on. When tissue swells and loosens, it can push the settling thread out of place.

These precautions exist to give the thread time to interlock with the tissue and settle in. Once that early period passes, the collagen-building process that follows is described as continuing naturally without needing much attention. Rather than checking for results too soon, treating the first few weeks as a natural recovery period the body works through on its own tends to lead to a more natural outcome.

References

Korean Dermatological Association, American Academy of Dermatology (AAD), and Ministry of Food and Drug Safety (MFDS).