Published 27 September 2026 · Reviewed by Dr Sin Yong
Three injectables are often discussed as if they were interchangeable: hyaluronic acid filler, Sculptra and Ellansé. They are not. They are made of different materials, they add volume in different ways, and, the part that matters most when a result is not right, only one of them can be dissolved.
Hyaluronic acid filler is a gel. Hyaluronic acid occurs naturally in skin; in filler it is cross-linked so it lasts longer. It adds volume where it is placed, immediately, and different products vary from soft to firm.
Individual product pages: Sculptra · Ellansé · Radiesse · Deusaderm (injected collagen).
Sculptra is poly-L-lactic acid. It is supplied as microparticles that are mixed with water before injection. The immediate fullness after treatment is mostly water and swelling, which settle within days. The lasting change comes from the body’s response to the particles as they break down, producing collagen gradually over the following weeks.
Ellansé is polycaprolactone. Its microspheres are suspended in a carboxymethylcellulose gel. The gel gives volume on the day; as it is absorbed, collagen forms around the microspheres, which break down slowly over time. Different formulations are designed to last for different lengths of time.
“The question to ask before any injectable is not how long it lasts. It is what happens if it is not right.”
Dr Sin YongOn choosing between HA, PLLA and PCL
Most comparisons focus on how natural each looks and how long it lasts. Those questions matter, but the one that matters most when something goes wrong is reversibility.
Hyaluronic acid filler can be broken down with hyaluronidase, an enzyme that can be placed where the product has settled. Firmer, more cross-linked gels respond more slowly, so dissolving is often staged.
Hyaluronidase does not dissolve poly-L-lactic acid or polycaprolactone. When Sculptra or Ellansé is in the wrong place, too much, or forms a nodule, the options are different: time, targeted treatment of nodules, and in some cases procedural removal. These are planned case by case and are more limited than dissolving.
A nodule is a firm lump under the skin. With hyaluronic acid, a lump is often product that can be dissolved. With poly-L-lactic acid, the US pivotal trial reported papules or nodules in 17.2% of patients, appearing months after treatment and mostly resolving on their own over time. Technique, dilution and placement depth all influence this risk. With polycaprolactone, nodules are also described and are managed without hyaluronidase.
Not every lump is a nodule of the product. Swelling, a small bruise, scar tissue and even a different filler injected previously can all feel similar, which is why the material is identified before anything is done. Ultrasound can often show what a lump is made of and where it sits.
There is no single answer, and anyone who offers one before examining you is guessing. Each has a place. Hyaluronic acid suits areas where precise, adjustable volume matters and where the ability to reverse is valuable, such as the lips and under the eyes. Collagen stimulators such as Sculptra and Ellansé are used for broader, gradual support in suitable faces. The choice depends on anatomy, what has already been injected, and how much uncertainty you are comfortable with.
If you have had more than one of these over the years, the priority is different: working out what is in your face now, and where, before anything else is added.
If a result from any of these does not look right, adding a different product to disguise it is the step most likely to make things harder. The useful first step is an examination, often with ultrasound, that establishes what material is present and where. I assess filler and collagen-stimulator concerns personally at Orchard Road.
No. Sculptra is poly-L-lactic acid, and hyaluronidase only breaks down hyaluronic acid. Concerns with Sculptra, such as nodules or uneven areas, are managed with time, targeted treatment and in some cases procedural options, planned case by case.
No. Ellansé is polycaprolactone microspheres in a carboxymethylcellulose gel, and hyaluronidase does not dissolve it. The gel carrier is absorbed on its own, and the microspheres break down slowly over time.
Hyaluronic acid filler is the one that can be broken down with hyaluronidase. Firmer, more cross-linked gels take longer to respond, so dissolving is often done in stages with a review in between.
Both are collagen stimulators, but they differ. Sculptra is poly-L-lactic acid microparticles, and its effect builds gradually over weeks. Ellansé is polycaprolactone microspheres in a gel, so it gives volume on the day and then stimulates collagen as the gel is absorbed.
Papules or nodules were reported in 17.2% of patients in the US pivotal trial of Sculptra, typically appearing months after treatment and mostly resolving on their own. Technique and dilution influence the risk. Any lump that is growing, painful or red should be reviewed.
Start with your records from the clinic that treated you. Where records are incomplete, examination and ultrasound can often identify the material and where it sits, which matters because each material is corrected differently.
It is sometimes done, but layering different materials makes later assessment and correction more complex. The priority is to know what is already present and where before anything else is added.
Vleggaar D, Fitzgerald R, Lorenc ZP. Composition and mechanism of action of poly-L-lactic acid in soft tissue augmentation. Journal of Drugs in Dermatology 2014;13(4 Suppl):s29–s31. source
US Food and Drug Administration. SCULPTRA® Aesthetic (injectable poly-L-lactic acid): instructions for use and patient information (P030050/S002), 2009. source
Christen MO, Vercesi F. Polycaprolactone: how a well-known and futuristic polymer has become an innovative collagen-stimulator in esthetics. Clinical, Cosmetic and Investigational Dermatology 2020;13:31–48. source
Yi KH, Wan J, Yoon SE. Considerations for proper use of hyaluronidase in the management of hyaluronic acid fillers. Plastic and Reconstructive Surgery Global Open 2025. source
Wortsman X. Identification and complications of cosmetic fillers: sonography first. Journal of Ultrasound in Medicine 2015;34(7):1163–1172. source
This article is general medical information, not a diagnosis. It contains no prices, before-and-after images or outcome claims by design.
Concerns about HA filler, Sculptra or Ellansé are assessed individually at Orchard Road, Singapore. Consultations by appointment.
WhatsApp +65 8023 7170 →