Dermal Fillers vs Rejuran: Two Different Targets

Dermal Fillers vs Rejuran: Volume Replacement vs Skin Regeneration

Medically reviewed by Dr. Kim Ju-Chan, Board-Certified Plastic Surgeon

Both arrive by needle, both sit in the same part of a clinic's menu, and both are talked about as ways to look less tired. That shared surface is why patients treat them as interchangeable and ask which one is better. At IBON Plastic Surgery they are listed as separate services in the petit category, and their published descriptions are aimed at different things — one at volume that is missing, the other at the condition of the skin itself. Once that is clear, "which is better" dissolves into a more answerable question: which problem do you actually have?

What Each One Is

The clinic's own descriptions are the place to start, and they are not describing the same intervention.

Dermal fillers are described as injectable treatments used to add volume or improve the appearance of selected facial areas. Depending on the product and the area, the clinic says they may be used for facial contouring, volume restoration, or the reduction of wrinkles. The mechanism is in the name: something is placed where something is wanted.

Rejuran is described as an injectable skin-rejuvenation treatment using polynucleotide formulations, with Rejuran HB combining polynucleotide with hyaluronic acid and lidocaine, designed to support skin hydration and overall skin quality. Its candidates are described as adults seeking improvement in skin texture, hydration, elasticity, or early signs of skin aging, who are medically suitable for injectable treatment.

Put the two candidate descriptions together and the split is visible. One is for a person who has lost contour in a specific place. The other is for a person whose skin has changed in character — texture, hydration, elasticity — across an area.

The Timing Difference Tells You What Is Happening

There is a practical tell that separates the two better than any description of mechanism, and it is worth knowing before you book anything.

For fillers, the clinic says some improvement can be visible soon after treatment, while swelling may temporarily affect how the result looks. Something occupies space immediately, so something changes immediately.

For Rejuran, it says skin-quality improvements develop progressively rather than immediately, and adds that maintenance treatments may be recommended. Nothing is being placed to hold a shape; the change is in how the skin behaves, and behavior takes time.

A patient who books the second expecting the first will leave the clinic thinking nothing happened. That is not a failure of the treatment — it is a mismatch between what was bought and what was expected, and it is entirely avoidable by reading one line of published material.

Longevity: Two Kinds of Fading

Both are described as temporary, and they are temporary in different ways.

The clinic describes filler benefits as temporary volume enhancement, facial contour refinement, and improvement in the appearance of selected lines or folds, with results varying according to the product, area, amount used, and individual characteristics. On longevity it says duration varies considerably depending on the filler material, the treatment area, metabolism, and individual factors.

For Rejuran the longevity statement is shaped differently: how long results last varies with the formulation, the treatment plan, the skin condition, and individual response, with maintenance possibly recommended.

Note what is doing the varying in each case. For fillers, the variables include the material and the patient's metabolism — how long a placed substance persists. For Rejuran, the variables include the treatment plan and the skin's own condition — how long an improvement in skin quality holds. Neither is published as a number of months, and any number you find elsewhere is describing a product in general rather than your face in particular.

Who Each One Screens Out

The exclusion lists are similar in shape and worth reading for what they share.

For fillers, treatment may be unsuitable for people with certain active skin infections or inflammation at the injection site, relevant allergies, or medical conditions that could increase risk, with individual assessment required beforehand.

For Rejuran, the clinic names active skin infection or inflammation at the injection site, known contraindications to the ingredients, and medical conditions making injectable treatment unsuitable, with treatment postponed until the patient is medically cleared.

The overlap is the point. Neither is casual. Both are injections into skin, both require the site to be healthy, and both require someone to have reviewed your history first. The clinic's consultation descriptions confirm this: for fillers, a discussion of aesthetic concerns, medical history, previous injectable treatments, medications, allergies, and desired outcomes, followed by an evaluation of the area; for Rejuran, an evaluation of skin condition, concerns, medical history, medications, allergies, and previous aesthetic procedures before deciding which formulation is appropriate and planning the areas.

One item on both lists deserves emphasis: previous injectable treatments. If you have had work done elsewhere, bring the details — product names if you have them, dates, and areas. It is the single piece of information a new clinician cannot get any other way.

What Each Feels Like, and the Anesthesia Difference

This is where the two diverge in a way patients notice on the day.

For fillers, pain control is described as depending on the area and the product, with options including topical anesthetic, local anesthesia, nerve blocks, ice, or fillers that contain a local anesthetic themselves.

For Rejuran, the clinic is specific about why comfort is a question at all: the treatment involves multiple injections and may cause temporary stinging or discomfort. Rejuran HB contains lidocaine, while additional topical numbing may be considered depending on the approach.

Multiple injections is the operative phrase. A treatment aimed at the quality of skin across an area is delivered across that area, which is a different experience from a smaller number of placements aimed at contour.

MedlinePlus, the U.S. National Library of Medicine's consumer health service, explains that anesthesia can be delivered in several ways — by injection, as a topical lotion or spray, and by other routes — and that a local anesthetic numbs a limited area while leaving you awake. For either treatment here, that is the category you are in, and asking which form is planned is a reasonable question to put before the needle comes out.

The Risk Lists

Both are disclosed, and both follow the same two-tier pattern.

Fillers. Common temporary effects include swelling, redness, tenderness, bruising, or discomfort at the injection sites. The clinic then adds that less common but potentially serious complications can occur, and that treatment should be performed by a qualified medical professional — a sentence that is doing more work than its length suggests.

Rejuran. Temporary redness, swelling, tenderness, small bumps, bruising, or discomfort can follow the injections, with less common complications including infection, prolonged inflammation, allergic reactions, or other injection-related problems. Small bumps appear here and not on the filler list, which is consistent with a treatment delivered as many small deposits.

Infection appears in the second tier for both. It is worth saying plainly that the first tier fades and the second tier does not necessarily, and that a treatment plan involving several visits multiplies the number of occasions on which either tier can occur.

Substitution Is the Mistake Worth Avoiding

Here is the practical consequence of everything above.

A patient with a hollow that has lost volume will not get it back from a treatment aimed at skin quality, however many sessions are done. A patient whose complaint is texture, dryness, or early skin aging will not get that addressed by placing volume under it — the shape may change, and the skin will be the same skin.

Choosing wrongly here is less costly than choosing the wrong surgery, which is exactly why it goes unexamined. The cost is a course of treatment that was never aimed at your complaint, plus the time before you conclude it did not work.

The clinic's published safety framing is the useful counterweight: its stated policy is genuine products used in appropriate quantities, with unnecessary and over-treatment avoided. Applied to this pair, restraint means matching the treatment to the finding rather than adding the other one when the first does not satisfy.

What to Ask

• Is my main finding lost volume, changed skin quality, or both?
• If it is both, which do you treat first and why?
• Which product and what amount, written down?
• How many sessions does the plan contain, and what would extend it?
• When should I expect to see a change, and when should I conclude it is not working?

That fourth question matters especially for the regenerative side, where improvements are described as developing progressively and maintenance may be recommended. A plan with a defined number of sessions is a commitment you can evaluate; an open one is not.

MedlinePlus puts the patient's side as an entitlement rather than a courtesy: the facts needed in order to decide, the upside and the downside both, and the freedom to withdraw agreement afterward rather than being held to it. The protections it sets out belong to United States law and do not travel with you to Korea, but the bar is a reasonable one to measure any consultation against — and being able to stop partway matters most when what you agreed to was a series.

A written plan is a reasonable thing to ask for before the first session, and requests go to the practice's contact page. How it describes planning treatment case by case is set out on the about us page.

The Bottom Line

• The two treat different things: fillers add volume or refine contour, while Rejuran uses polynucleotide formulations aimed at skin texture, hydration, and elasticity.
• The timing differs accordingly — some filler improvement can be visible soon after treatment, while Rejuran's skin-quality changes are described as developing progressively.
• Rejuran HB combines polynucleotide with hyaluronic acid and lidocaine, which is also why its comfort profile differs from plain Rejuran.
• Neither has a published duration; longevity for fillers varies with material, area, metabolism, and individual factors, and for Rejuran with formulation, plan, skin condition, and response.
• Both exclude active infection or inflammation at the injection site and require an individual assessment, and both disclose a second tier of less common complications in which infection appears.

Frequently Asked Questions

What is the difference between dermal fillers and Rejuran?

Fillers are injectable treatments used to add volume or improve the appearance of selected areas. Rejuran is an injectable skin-rejuvenation treatment using polynucleotide formulations, aimed at skin texture, hydration, elasticity, and early signs of aging.

Can one replace the other?

They are described for different findings, so substitution generally means treating something other than your complaint. A consultation is needed to establish whether volume, skin quality, or both are at issue.

How soon will I see results?

For fillers, some improvement can be visible soon after treatment, though swelling may temporarily affect the appearance. For Rejuran, the clinic describes improvements developing progressively rather than immediately.

What is Rejuran HB?

The clinic describes it as combining polynucleotide with hyaluronic acid and lidocaine, designed to support skin hydration and overall skin quality. The lidocaine content is also relevant to comfort during treatment.

Does either hurt?

Rejuran involves multiple injections and may cause temporary stinging or discomfort, with Rejuran HB containing lidocaine and additional topical numbing possibly considered. For fillers, pain control depends on the area and product and may involve topical anesthetic, local anesthesia, nerve blocks, ice, or a filler containing local anesthetic.

What are the risks?

Both list temporary injection-site effects — swelling, redness, tenderness, bruising, discomfort, and for Rejuran small bumps. Both then name a less common tier: infection, prolonged inflammation, and allergic reactions for Rejuran, and potentially serious complications for fillers.

How many sessions will I need?

Ask for the number before the first appointment. Rejuran's published material notes that maintenance treatments may be recommended, and longevity for both is described as varying with several individual factors.

This article is for general informational purposes and does not constitute individualized medical advice, and it is not a self-diagnosis tool. Treatment suitability and expected outcomes can only be determined through a consultation with a qualified plastic surgeon.

References & Sources

1. MedlinePlus — Anesthesia
2. MedlinePlus — Patient Rights
3. MedlinePlus — Infection Control
4. MedlinePlus — Talking With Your Doctor
5. StatPearls — Informed Consent