Silhouette Soft vs Aptos Thread Lift: Which Is Right?

Medically reviewed by Dr. SuHyun Kim, Medical Director, Aube Clinic

Thread lifting has become one of the most talked-about non-surgical options for people who want a firmer, more defined look without surgery. Among the many systems available, two names come up again and again: Silhouette Soft and Aptos. Both use absorbable threads to reposition and support soft tissue, and both aim for a natural, gradual result. But they are built from different materials, work through slightly different mechanisms, and tend to suit different faces and goals.

This guide compares the two on the things that actually matter — how each thread works, how long results tend to last, who each may suit, and what neither can do. The aim is to help you ask better questions at a consultation, not to declare a single winner, because the "best" thread is the one matched to your anatomy and objectives.

The Bottom Line

• Silhouette Soft and Aptos are both absorbable thread systems, but they differ in material and design. Silhouette Soft uses poly-L-lactic acid (PLLA/PLGA) threads with bidirectional cones; Aptos uses cog-style threads that, in several lines, are infused or coated with hyaluronic acid (HA).
• Both work by two mechanisms: immediate mechanical repositioning of tissue plus a slower biostimulation effect, as the absorbable material prompts the body to form new collagen over time.
• Regulatory status differs by market. In the United States, the PLLA/PLGA thread marketed as Silhouette InstaLift is FDA-cleared; "Silhouette Soft" is a non-US brand name, so we make no US FDA claim for it. Aptos is a Korea- and CE-market system and is not described here as US FDA-cleared.
• Neither is a facelift. Threads cannot replicate surgery. Results are gradual, subtle, vary between individuals, and are temporary — the threads absorb and the effect fades over time.
• Candidacy is individual. Skin thickness, degree and pattern of laxity, facial anatomy, and goals determine which system — if either — is appropriate, and that is decided in an in-person assessment.

What a thread lift does — and does not — do

A thread lift uses fine, absorbable sutures inserted under the skin to gently reposition and support sagging soft tissue. The threads carry small structures — cones or cogs — that grip the tissue and hold it in a slightly lifted position. That produces an immediate, mechanical repositioning. Over the following weeks and months, as the thread material is gradually absorbed, it stimulates a wound-healing response and new collagen forms along the thread's path. This is the biostimulation half of the effect, and it is why results can continue to refine after the procedure.

The published literature describes exactly this dual mechanism for absorbable lifting threads: an immediate mechanical lift combined with longer-term collagen stimulation. It also makes two limits clear. First, thread lifting is a minimally invasive procedure with real risks — swelling, bruising, dimpling, thread palpability or extrusion, asymmetry, and infection are among the reported complications, and complication rates in the literature are not trivial. Second, a thread lift is not a facelift. It offers a lesser, temporary lift and is best suited to mild-to-moderate laxity, not to significant sagging that only surgery can address.

With that shared foundation in mind, here is how the two systems differ.

Silhouette Soft: PLLA cones

Silhouette Soft belongs to the PLLA family of threads. The suture is a monofilament of poly-L-lactic acid, and along it sit bidirectional cones made of a polyglycolide/L-lactide (PLGA) blend. When the thread is placed, these cones anchor the tissue from both directions of a central point, allowing the clinician to gather and reposition soft tissue toward a lifted position.

The cone design is a defining feature. Because cones present a broader, smoother contact surface than sharp barbs, they are generally described as reducing certain risks such as dimpling and palpability, though no design eliminates risk. PLLA is also a well-known biostimulatory material: as it absorbs, it encourages neocollagenesis, so a portion of the benefit comes from collagen laid down over the months after treatment. Results from PLLA thread systems are commonly discussed in the range of around a year or more, but longevity is individual and not guaranteed.

Regulatory note (important): In the United States, the closely related PLLA/PLGA cone thread is marketed as Silhouette InstaLift, which holds a US FDA 510(k) clearance (510(k) number K142061) for mid-face soft-tissue repositioning. The brand name "Silhouette Soft" is used outside the United States and is not something we describe as US FDA-cleared. If US regulatory status matters to you, ask specifically which product and brand a provider is referring to, because the clearance attaches to the specific cleared device and indication.

Aptos: HA-infused cog threads

Aptos is a thread system developed with a different design philosophy. Rather than cones, several Aptos lines use cog-style threads — threads with cut or molded projections along their length that catch and hold tissue. A distinguishing feature of many Aptos threads is the incorporation of hyaluronic acid (HA), either infused into or coating the thread material, alongside biodegradable polymers such as poly-L-lactide and caprolactone.

The rationale for adding HA is to pair the mechanical and collagen-stimulating action of the thread with the hydrating, biorevitalizing properties associated with hyaluronic acid. Research on HA-coated poly(L-lactide-co-caprolactone) lifting threads has examined these biorevitalizing and skin-remodeling properties over time. In practice, this means Aptos is often discussed not only as a lifting thread but as one intended to contribute to skin quality along the treated path. As with any thread, longevity varies by individual and by the specific line used, and results are temporary.

Regulatory note: Aptos is a system marketed in Korea and under CE marking in Europe. We do not describe Aptos as US FDA-cleared. As always, regulatory status is device- and market-specific.

Silhouette Soft vs Aptos: how they compare

Bringing the two together:

• Anchoring structure: Silhouette Soft uses bidirectional cones; Aptos lines commonly use cogs. Cones offer broad, smooth tissue contact; cogs offer numerous gripping points along the thread.
• Material and added ingredients: Silhouette Soft is PLLA with PLGA cones; many Aptos threads combine biodegradable polymers with hyaluronic acid for an added hydrating, biorevitalizing aim.
• Mechanism emphasis: Both provide immediate mechanical lift plus collagen biostimulation; Aptos's HA element adds a skin-quality dimension along the thread.
• Longevity: Both are absorbable and temporary. PLLA systems are frequently discussed around a year or more, and Aptos longevity likewise varies by line and individual — neither offers a guaranteed duration.
• Regulatory status: The US-market PLLA/PLGA cone thread (Silhouette InstaLift) is FDA-cleared under K142061; "Silhouette Soft" and Aptos are non-US brands for which we make no US FDA claim.

There is no universal winner. Cone-based repositioning and cog-based gripping simply behave differently in tissue, and the HA element gives Aptos a different emphasis. Which behaves better on a given face depends on that face.

Which one might be right for you?

The honest answer is that candidacy is individual and best determined in person. As a general orientation, a clinician may lean toward one system based on the degree and pattern of laxity, the thickness and quality of your skin, the area being treated, your history of prior treatments, and whether an added skin-quality benefit is a priority. Some people are well suited to a cone-based approach, some to a cog-and-HA approach, and some to a tailored combination or to a different treatment category altogether.

What should not drive the decision is marketing. A thread is a tool, and the skill lies in matching the tool to the anatomy and placing it well. If your goal is a subtle, natural refinement of a jawline or midface with mild-to-moderate laxity, threads may be worth discussing; if you have significant sagging, an in-person assessment may point you toward other options and set realistic expectations.

At Aube Clinic, thread selection follows an individualized, anatomy-based consultation with Dr. SuHyun Kim rather than a one-size-fits-all protocol. You can read more about our single-doctor, one-patient-per-visit model on our about us page, and you can arrange an in-person assessment through our contact us page.

What to expect during and after treatment

Both Silhouette Soft and Aptos are placed as in-office procedures under local anesthesia. After marking the planned thread paths, the clinician introduces the threads through small entry points using a needle or cannula, positions them along the mapped vectors, and gently repositions the tissue before trimming any excess. The immediate lift you see on the table comes from this mechanical repositioning; the slower, collagen-driven refinement follows over the subsequent weeks.

Recovery is generally short but not nothing. Swelling, bruising, tightness, and mild soreness in the first days are common and usually manageable, and you may briefly feel the threads or notice slight puckering as the tissue settles. Most people are advised to avoid strenuous activity, wide mouth movements, facial massage, and dental work for a period, and to sleep face-up while healing. These instructions are not busywork — they reduce the chance of thread migration, dimpling, or asymmetry during the vulnerable early phase. Your provider should give you specific, written aftercare guidance tailored to the system used.

It also helps to keep expectations grounded. Because part of the benefit is biostimulation, the final look continues to refine after the swelling resolves, and the eventual result is a subtle improvement rather than a dramatic change. As the threads absorb over the following months, the lift gradually relaxes, which is why threads are described as temporary and why maintenance or repeat treatment is part of a longer-term plan for many people. Neither Silhouette Soft nor Aptos halts aging; they offer a window of improvement, not a permanent correction.

Finally, candidacy screening matters as much as technique. Certain factors — active skin infection, very thin or very lax tissue, unrealistic expectations, or specific medical conditions — may make threads unsuitable, and a careful provider will decline or redirect when a thread lift is not the right call. That honest filtering is a feature of good care, not an obstacle.

Frequently Asked Questions

What is the main difference between Silhouette Soft and Aptos?

The clearest difference is in design and material. Silhouette Soft uses PLLA threads with bidirectional PLGA cones, while many Aptos threads use cog-style projections combined with hyaluronic acid for an added hydrating aim. Both provide an immediate mechanical lift plus gradual collagen stimulation, but the anchoring structure and added ingredients differ.

Which thread lift lasts longer?

Both systems are absorbable and temporary, so neither offers a guaranteed duration. PLLA-based thread results are frequently discussed in the range of about a year or more, and Aptos longevity varies by the specific line and the individual. Real-world longevity depends on your tissue, the area treated, and how your body responds.

Is Silhouette Soft FDA-cleared in the United States?

The PLLA/PLGA cone thread marketed in the US as Silhouette InstaLift holds a US FDA 510(k) clearance (K142061) for mid-face soft-tissue repositioning. "Silhouette Soft" is the non-US brand name, so it is not something we describe as US FDA-cleared. If regulatory status matters to you, ask a provider exactly which product and brand they use.

Is a thread lift the same as a facelift?

No. A thread lift is a minimally invasive, non-surgical procedure that provides a lesser, temporary lift, whereas a surgical facelift physically repositions tissue and is a different category of procedure performed by surgeons. Threads are best suited to mild-to-moderate laxity and cannot replicate a surgical result.

What are the risks of thread lifting?

Reported risks include swelling, bruising, discomfort, skin dimpling, thread palpability or extrusion, asymmetry, and infection, among others. Complication rates in the published literature are not negligible, which is why technique and candidate selection matter. A thorough consultation should review your individual risks before any procedure.

Can Silhouette Soft and Aptos be combined with other treatments?

In some plans, threads are considered alongside other non-surgical treatments to address different concerns, but whether that is appropriate is entirely individual. Combining treatments is a clinical decision made during an in-person assessment, not a default. Your clinician can explain what is and is not advisable for your situation.

How do I know which thread is right for me?

Only an in-person evaluation can answer that reliably. A clinician considers your skin thickness and quality, the degree and pattern of laxity, the area to be treated, and your goals before recommending a system — or advising a different approach. There is no single "best" thread that suits everyone.

Disclaimer

This article is for general educational purposes about non-surgical aesthetic medicine and is not medical advice, a diagnosis, or a treatment recommendation. It is not a self-diagnosis tool. Thread lifting carries risks, and its results are gradual, variable, and temporary rather than guaranteed. Individual candidacy and outcomes differ, so please consult a qualified physician in person to determine whether any treatment is appropriate for you.