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Since the approval of Restylane by the FDA in 2005 with Juvéderm following in 2006, dermal fillers have been a popular feature of the aesthetic world. In fact, after Botox, those two dermal fillers are the most popular cosmetic injectables around the globe.

But now you could say there’s a new kid in town — Resilient Hyaluronic Acid dermal fillers, RHA fillers for short. They’ve been available in Europe for over five years, but recently received FDA approval for the U.S. market.

We’re excited to offer all three Teoxane RHA fillers at ACQUA Medspa.

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What are RHA fillers?

RHA stands for resilient hyaluronic acid, and this is the latest advance in dermal filler science. These fillers are designed for the dynamics of our facial movements, so the volume they provide looks more natural and adapts to movement without breaking down as quickly.

There are currently three available Teoxane RHA dermal fillers, RHA 2, RHA 3, and RHA 4. These are marketed in the U.S. by Revance.

What is the difference between RHA fillers and regular dermal fillers?

Beautiful Asian woman gets dermal filler injections. Most people have heard of Juvéderm and Restylane, along with their respective families of dermal fillers. All of these fillers are made from hyaluronic acid, a naturally occurring substance in the human body (and most other mammals) that is responsible for hydrating, plumping, and firming the skin. Hyaluronic acid does this by binding with nearby water molecules.

These fillers have provided great results, but sometimes don’t respond as well when the patient’s face moves with expressions and the like. That’s because hyaluronic acid breaks down rapidly and is metabolized in about 48 hours. To prevent this from happening, with first-generation dermal fillers the HA is crosslinked with suspended chemical proteins. These proteins make the HA in first-generation dermal fillers not as malleable with facial movements.

The difference between RHA and first-generation hyaluronic acid dermal fillers is that these new fillers have fewer chemical modifications and crosslinking in longer chains of HA. This makes RHA fillers closer to the natural hyaluronic acid that is found throughout the human body in their flexibility in usage, natural-looking results, and longevity of results. Basically, RHA fillers are closer to natural hyaluronic acid, so they are undetectable regardless of facial movements. That’s the improvement RHA fillers makeover the first-generation HA fillers.


Like the other dermal fillers, RHA fillers are meant to address the static wrinkles found on the mid to lower faces, such as nasolabial folds, lip augmentation, parentheses lines, and marionette lines.

Because RHA fillers are made from hyaluronic acid, which occurs naturally in the human body, reactions are very rare. Just about anyone bothered by telltale lines and creases on the mid to lower face is a great candidate for this latest generation of dermal fillers in RHA 2, RHA 3, and RHA 4.

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Issues that RHA fillers treat

Before and after portrait of a woman that received dermal filler injections. All three RHA dermal fillers closely resemble the native hyaluronic acid present in our skin, so they adapt quite well to our tissue when injected. This allows exceptional results for patients at every angle all the way through the entire length of movement. In other words, they return volume and erase lines, but you don’t notice them when you make normal facial movements.

  • RHA 2 works best on nasolabial folds, the colloquial “smile lines” that run from the nose down to the corners of the mouth.
  • RHA 3 can be used for nasolabial folds and the commissures, the corners of the mouth.
  • RHA 4 is most appropriate for deeper nasolabial folds and for deeper lines in the lower face and jawline. RHA 4 can also be used off-label in the midface to add volume to sunken cheeks.


These new RHA fillers are injected in the same way as other dermal fillers. We use an ultrafine needle for these injections. Plus, all three RHA fillers have lidocaine in their formula to help keep you comfortable.

How long does an RHA filler injection session take?

These sessions take just 15 minutes or so, and patients can get right back to work or their other normal activities immediately afterward.

How Quickly Do RHA Dermal Fillers Work?

These fillers provide immediate volume return, just as is the case with the first-generation dermal fillers such as Restylane.

How long will my results last with RHA dermal fillers?

These new RHA fillers provide natural-looking results for up to 15 months.

Schedule Your Consultation Today

If you’re interested in learning more about RHA dermal fillers please contact us for a consultation at 281-606-2331 or fill out our contact us form. We will discuss your needs and concerns, and determine your best course of action.

The service and staff are amazing! I came in for dysport and was a bit nervous but they made me feel very comfortable and at ease.


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Dear Patients,


We are announcing the relocation of Kim Carpin Plastic Surgery and the closure of Acqua Medspa effective March 31, 2023.


We are excited to continue to provide excellent Plastic Surgery and Medical Spa services at Houston Plastic and Reconstructive Surgery, a state-of-the-art facility located in Webster, Texas. In addition, our new location houses a certified in-office surgical suite.


Your medical records will be transferred to the new location. Please feel free to request a copy of your medical records at any time by emailing [email protected] or via phone.


Our new address is:

575 E Medical Center Blvd, Webster, TX 77598


Our phone numbers will be:


We will begin seeing patients at the new location Wednesday, April 5th, 2023.

We look forward to seeing you at our new location!



Dr. Kimberly Carpin


Relocation Announcement