Facial Fat Grafting · FAMI Fat Grafting
Worried about the take rate?
Wouldn't injecting more solve the problem?
It's one of the most common questions we hear during fat grafting consultations. Mathematically, it seems to make sense — but in reality, it's one of the biggest misconceptions that leads to poor outcomes. Let's break down why the environment, not the volume, is what truly determines graft survival.
Why Does the Logic of "More In, More Survives" Exist?
There's one question that comes up in nearly every fat grafting consultation: "If the survival rate is only 30–50% anyway, couldn't we just graft twice as much from the start and end up with exactly the volume I want?" On the surface, it sounds perfectly logical — graft double, lose half, and what's left is right on target.
In fact, some practitioners in the past did attempt this approach, known as over-grafting — trying to compensate for poor survival rates simply by injecting more volume. But what were the results? Rather than a predictable, even outcome, complications that were difficult to foresee occurred far more often than not.
To answer this question properly, we first need to understand what "graft survival" actually means. In fat grafting, survival isn't simply about fat remaining in the body. It's the process by which transplanted fat cells establish themselves as living tissue by receiving oxygen and nutrients from the surrounding tissue. When this process fails, the fat dies and is either absorbed or leads to even worse outcomes.
The key issue is that this oxygen supply has a physical limit. Once the volume exceeds what the surrounding vasculature can reach — known as tissue tolerance — what increases isn't the amount of surviving fat, but the amount of dead fat. That's precisely why the "more in, more survives" logic simply doesn't hold up in practice.
The Complications of Over-Grafting — Fat Necrosis, Cysts, and Calcification
For transplanted fat to survive, revascularization must occur. New blood vessels need to grow into the grafted fat cells before engraftment is truly complete. This process unfolds gradually over days to weeks following the procedure.
The limiting factor is how far blood vessels can reach. Fat cells must be positioned within approximately 1–2mm of surrounding vasculature to receive adequate oxygen. Cells beyond that threshold will become hypoxic and die before revascularization can finish. This is why grafting fat in thick clumps creates a situation where the outer layer survives while the core dies off.
What happens when dead fat tissue isn't fully reabsorbed by the body? Three major complications can arise. First, oil cysts — necrotic fat liquefies and forms pocket-like structures. Small ones may be reabsorbed naturally, but larger ones can become palpable or lead to inflammation. Second, calcification — calcium deposits build up in the dead fat tissue, hardening into firm nodules that may appear on imaging and feel like foreign bodies under the skin. Third, nodule formation — unabsorbed necrotic tissue remains as lumps, causing an uneven or bumpy surface texture that can be seen or felt.
Over-grafting isn't simply "ineffective" — it actively creates these complications. This is precisely why the "more is better" logic is so dangerous in fat grafting.
Over-Grafting Approach
Compensate for poor take rates by injecting more
- Higher risk of central fat necrosis
- Risk of oil cysts and calcification
- Unpredictable volume, inconsistent results
- Face may appear unnaturally overfilled
FAMI Precision Grafting
Optimal volume, micro-particle fat, multi-layer dispersion
- Micro-particle size maximizes vascular accessibility
- Multi-layer dispersion optimizes the engraftment environment
- Predictable volume and shape outcomes
- Natural facial contours preserved
Ultimately, the true measure of fat grafting isn't how much was injected — it's how much survived. The quality of engraftment always outweighs the quantity. This shift in perspective is exactly what gave rise to the FAMI fat grafting technique.
How PAMI Fat Grafting Solves the Engraftment Problem
PAMI stands for Processing And Micro Injection. True to its name, PAMI differs from conventional methods in both how fat is processed and how it is injected. Rather than simply increasing volume, it's a technique designed to create an environment where each individual fat cell can survive.
Harvesting — Minimal Trauma Principle
Minimizing cell damage begins at the very first step: harvesting. Excessive suction pressure can destroy fat cells during extraction itself. PAMI Fat Grafting uses a low-pressure aspiration protocol that preserves cell viability to the greatest extent possible. The quality of the harvesting stage sets the foundation for everything that follows.
Purification — Isolating Pure Fat Cells
Harvested fat contains a mixture of blood, free fatty acids, and debris from damaged cells — all of which can trigger inflammatory responses. Through centrifugation and filtration, PAMI isolates and preserves the pure fat cells and ADSCs (adipose-derived stem cells) that are most conducive to engraftment. The fewer the impurities, the lower the post-procedural inflammation and the cleaner the environment for successful take.
Micro-Particulation — Maximizing Vascular Accessibility
This step involves processing the purified fat into ultra-fine particles. The smaller the particle, the closer each cell sits to surrounding blood vessels, enabling faster delivery of oxygen and nutrients — and making angiogenesis far more achievable. Getting the particle size right is one of PAMI's core technical challenges: too small, and the cells themselves are damaged; too large, and new blood vessel formation is delayed. It's a precision that demands both experience and skill.
Multi-Layer Dispersal Injection — Designing a Uniform Engraftment Environment
This is the most critical step. The micro-particulated fat is injected in small amounts, evenly distributed across multiple facial layers — including the subcutaneous layer, fat layer, and above the fascia. Rather than concentrating fat in a single plane, it's spread like a net across a wide area. Each particle is positioned close to blood vessels, enabling uniform engraftment throughout. At this stage, the practitioner's anatomical knowledge and hands-on experience make all the difference in the outcome.
"Engraftment rates don't improve simply by increasing the volume of fat transferred. The essence lies in creating an environment where each fat cell can survive — and PAMI is the technique designed to engineer exactly that environment. Shifting from a logic of quantity to a logic of environment: that is the paradigm shift in fat grafting."
Why Each Facial Zone Has a Different "Capacity" for Fat Grafting
Every area of the face differs in skin thickness, fat layer structure, vascular distribution, and tissue density. These factors determine how much fat each zone can realistically receive and retain — a concept known as tissue tolerance. When this threshold is ignored, results don't improve; they deteriorate.
Take the tear trough beneath the eyes as an example. The skin here is extremely thin, with almost no fat layer to speak of. Before new blood vessels can form to nourish the transferred fat cells, the margin for survival is already very narrow. Overfilling this zone significantly raises the risk of necrosis or persistent nodules before engraftment can occur. The cheeks, by contrast, have a comparatively thick fat layer and a rich vascular network — conditions that allow them to accommodate a greater volume of grafted fat.
The forehead also calls for careful consideration. Its dense vascular distribution creates a generally favorable environment for engraftment, but the skin's natural tension means that too much volume won't fill in evenly — it can surface irregularly instead. This is precisely why forehead fat grafting demands a particularly precise touch.
The nasolabial fold area presents its own challenge: constant, repetitive facial movement makes it difficult for grafted fat to remain stable over time. Because each zone has its own optimal graft volume and placement strategy, these judgments play a decisive role in determining the final outcome.
3–4 Layers
Number of facial tissue layers fat is distributed across during grafting (varies by zone)
1–2mm
Maximum distance from a blood vessel for fat cells to receive adequate oxygen
2–3 Months
Time after graft stabilization when final results can be accurately assessed
At Cellon Clinic, every treatment begins with a thorough consultation in which we analyze each patient's unique facial structure, fat distribution, and desired outcome before building a zone-specific grafting plan. The goal is never to inject as much as possible in a single session — it's to graft precisely the amount each area can safely accept and sustain for lasting results.
So, How Do You Actually Achieve the Volume You Want?
Even with FAMI fat grafting, a single session may not fully meet your volume goals — especially if you're targeting significant improvement or areas where graft survival tends to be more challenging. At Cellon Clinic, we recommend two approaches for situations like this.
Approach 1 — A Two-Stage Plan with Touch-Up
Rather than trying to achieve full volume in a single session, we assess how the initial graft has taken and apply a small touch-up only where needed. At the 2–3 month mark, once graft survival has stabilized, we can pinpoint exactly which areas need more and by how much — allowing for more precise, natural-looking results. This is far safer and more predictable than over-grafting and risking complications.
Approach 2 — Stem Cell-Enhanced Grafting Based on Regenerative Medicine
As a Designated Advanced Regenerative Medicine Hospital in Cheongdam under the Ministry of Health and Welfare, Cellon Clinic has the expertise to utilize ADSCs (Adipose-Derived Stem Cells). By applying stem cells isolated and concentrated from fat tissue alongside the graft, we can accelerate angiogenesis and improve the overall conditions for graft survival. The goal isn't to increase volume — it's to improve the grafted cells' ability to thrive. This approach is only available at hospitals designated as advanced regenerative medicine institutions.
Both approaches are the opposite of simply "solving it with more volume." The goal isn't to inject more — it's to create conditions where living cells can take hold and survive. That is the standard of fat grafting Cellon Clinic stands by.
Frequently Asked Questions — Fat Grafting Survival Rate & PAMI
Q. What is the actual survival rate for PAMI fat grafting?
It's difficult to pin down an exact number, because survival rates vary depending on the patient's condition, the treatment area, the provider's technique, and post-procedure care. What matters more than a percentage is how consistent and predictable the results are. Compared to conventional methods, PAMI delivers greater graft stability with less variability in outcomes. At Cellon Clinic, every step — from fat harvest to injection — is managed to optimize the conditions that support successful engraftment.
Q. If a lot of the fat gets reabsorbed, will I always need a touch-up?
Not necessarily. If you're happy with the results from the initial procedure, you can maintain a great outcome without any additional treatment. That said, if you're looking for a higher level of refinement or feel that volume in a specific area falls short, a small touch-up done 2 to 3 months after the graft has stabilized is the most precise way to achieve it. This approach is far more predictable than over-grafting from the start — and carries a much lower risk of complications.
Q. What happens if an oil cyst or calcification develops after fat grafting?
Oil cysts and calcification are complications that can arise from over-grafting or technically suboptimal procedures. Small cysts may resolve on their own, but larger ones or those accompanied by inflammation often require medical intervention. At Cellon Clinic, the PAMI technique carefully controls the volume and particle size of the graft, and uses a multi-layer dispersal injection method to maintain each cell's proximity to blood vessels — minimizing the conditions that lead to these complications in the first place.
Q. Is fat grafting still possible if I don't have much harvestable fat?
When the available fat supply is genuinely limited, the amount that can be grafted may be restricted. In these cases, rather than relying on fat grafting alone to achieve the desired volume, we may consider combining it with filler or designing a plan that incorporates a lifting procedure. During your consultation at Cellon Clinic, we assess your body type and potential harvest sites together to suggest a realistic treatment plan. A combined approach often produces better results than pushing fat grafting beyond its practical limits.
Q. What's the biggest difference between PAMI fat grafting and conventional fat grafting?
The most significant difference lies in how the fat is processed and injected. Conventional fat grafting typically involves injecting larger fat particles into fewer tissue layers, whereas PAMI processes the fat into micro-particles and delivers them using a multi-layer dispersal technique. The procedure is engineered so that each fat cell is positioned close to a blood supply — making the entire grafting environment more favorable for survival. The result is greater consistency and stability in engraftment, along with a reduced risk of the complications associated with over-grafting.
Cellon Clinic · Cheongdam Designated Advanced Regenerative Medicine Hospital
With fat grafting, it's the environment — not the volume — that drives results.
Learn more about PAMI fat grafting and our regenerative medicine approach
in a personal consultation with Dr. Kang Seung-hoon, Medical Director.
