You have probably heard of both Ultherapy Prime and XERF as standalone treatments for skin tightening. But what happens when you combine them?
The short answer: they work on different layers of your skin, using entirely different energy sources. When paired strategically, this multi-layer approach can deliver results that neither treatment achieves alone.
Here is how the combination works and why it matters who designs your treatment plan.
What Is Ultherapy Prime?
Ultherapy Prime uses micro-focused ultrasound with visualisation (MFU-V) to target the deeper structural layers of your skin. It is the only non-invasive device that is FDA-cleared for lifting the skin on the face, neck, and décolletage.
What makes it different from other energy-based devices is depth and precision:
- 4.5mm transducer: reaches the SMAS (Superficial Musculoaponeurotic System), the same layer surgeons tighten during a facelift
- 3.0mm transducer: targets the deep dermis
- 1.5mm transducer: treats the superficial dermis
The device includes real-time ultrasound visualisation, meaning the doctor can see the exact tissue layers being treated during the procedure. This is not a standard feature on most energy-based devices; it allows the operator to place energy precisely where it needs to go and avoid areas like bone or major vessels.
Ultherapy Prime creates small thermal coagulation points deep within the skin. These micro-injuries trigger the body's natural wound-healing response, stimulating new collagen and elastin production over the following 2 to 6 months.
What Is XERF?
XERF is a radiofrequency (RF) based device that uses controlled RF energy to heat the skin at shallower depths compared to Ultherapy Prime.
While Ultherapy Prime works from the inside out starting at the deepest structural layer XERF focuses on the dermal and subdermal layers. The RF energy heats tissue uniformly, causing immediate collagen contraction and triggering longer-term collagen remodelling.
Key characteristics of XERF:
- Radiofrequency energy a different wavelength and mechanism from ultrasound
- Targets the dermis and superficial subdermal layer the zones responsible for skin texture, fine lines, and surface tightness
- Volumetric heating delivers consistent energy distribution across the treatment area
- Complements deeper treatments by addressing what ultrasound alone does not reach as effectively at the surface level
Think of it this way: if Ultherapy Prime rebuilds the deep foundation of your skin, XERF refines the surface.
Why the Combination Works: A Multi-Layer Approach
Skin aging does not happen in one layer. Collagen loss, elastin degradation, and structural changes occur across multiple depths simultaneously:
- The SMAS and deep dermis lose structural integrity leading to sagging, jowls, and a softened jawline
- The mid-dermis loses collagen density contributing to volume loss and deeper folds
- The superficial dermis shows textural changes fine lines, roughness, and reduced firmness
No single device addresses all of these layers with equal effectiveness. That is where the combination strategy becomes relevant.
How the Layers Map to Each Device
When combined, you get energy delivered across the full thickness of the skin from the SMAS layer up to the surface. Each device works where it is most effective, without redundancy.
The Result
- Ultherapy Prime provides the deep structural lift tightening the foundation
- XERF delivers surface-level tightening and texture improvement refining the finish
- Together, they create a more comprehensive result than either could alone
This is not about doing more for the sake of more. It is about matching the right energy to the right depth.
Who Is a Good Candidate for This Combination?
Not everyone needs both treatments. The combination approach is typically suited for:
- Mild to moderate skin laxity visible sagging along the jawline, neck, or midface, combined with surface textural concerns
- Ages 35–60+ when both deep structural changes and surface-level ageing are present
- Patients who want comprehensive results without surgery looking for the most thorough non-invasive approach available
- Those who have had one treatment before and want to address remaining concerns for example, someone who had Ultherapy Prime and still notices surface texture issues
The combination is generally not necessary for:
- Younger patients (under 35) with mild concerns that a single device can address
- Those with only surface-level issues (XERF or other RF treatments alone may suffice)
- Those with only deep laxity (Ultherapy Prime alone may be the right choice)
This is why assessment matters more than the treatment itself.
What to Expect: Treatment Protocol and Timeline
During Treatment
- Ultherapy Prime and XERF are typically performed in the same session or staged across two sessions, depending on the treatment plan
- Treatment time: approximately 60 to 90 minutes for a combined session
- Comfort measures are available topical numbing and, where appropriate, additional comfort protocols
After Treatment
- Mild redness, slight swelling, and tenderness are common and typically resolve within hours to a few days
- No significant downtime most patients return to normal activities the same day
Results Timeline
The key point: collagen remodelling is a biological process. It takes time. Patients who expect overnight results from non-invasive treatments will be disappointed regardless of which device is used.
Why It Matters Who Performs Your Treatment
Here is what many patients do not realise: the same device in different hands can produce very different outcomes.
With Ultherapy Prime specifically, the variables that affect results include:
- Energy parameters: how much energy is delivered per line, and how many lines per area
- Transducer selection: which depths are treated, and in what order
- Visualisation use: whether the operator actively uses real-time imaging to guide placement
- Anatomical knowledge: understanding where to place energy for maximum effect and where to avoid
- Treatment design: knowing when a single device is enough and when a combination genuinely adds value
A doctor who understands both Ultherapy Prime and radiofrequency technology can design a protocol where the two complement each other rather than overlapping or creating unnecessary treatment.
Dr. Michelle Ng: Merz Trainer for Ultherapy Prime and Merz Injectables
Dr. Michelle is one of a small select group of doctors appointed by Merz Aesthetics as a certified trainer for both Ultherapy Prime and Merz Injectables.
What does this mean in practice?
- She trains other doctors on how to use Ultherapy Prime correctly from parameter settings to transducer placement to patient assessment
- She holds the same trainer certification for Merz Injectables (dermal fillers and neurotoxins), giving her a dual understanding of both device-based lifting and injectable-based facial rejuvenation
- This dual expertise means she understands facial anatomy from two complementary perspectives: structural lifting through energy devices, and volume and contour through injectables
The designation reflects clinical proficiency, teaching ability, and a deep understanding of the technology, not just the ability to operate the device.
When Dr. Michelle designs a combination protocol using Ultherapy Prime and XERF, that plan is informed by the same level of knowledge she uses to train other physicians. She knows the device inside out its capabilities, its limitations, and the nuances that separate an adequate treatment from an exceptional one.
At ARTÉ, every treatment is performed personally by Dr. Michelle or Dr. Alfred who is personally trained by Dr. Michelle.
Frequently Asked Questions
Start Your Journey
If you are considering Ultherapy Prime, XERF, or a combination approach, the right starting point is always an assessment not a booking.
Dr. Michelle will evaluate your skin laxity, discuss your goals, and design a treatment plan that matches your anatomy and expectations. Sometimes that means one device. Sometimes it means a combination. The recommendation follows the assessment, not the other way around.
Book a consultation at ARTÉ by Dr. M Millenia Walk, 9 Raffles Blvd, #02-42, Singapore 039596 (+65) 8206 8869 | hello@artebym.com
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
This article is written by Dr. Michelle Ng (MBBS (Singapore)), Merz Certified Trainer for Ultherapy Prime and Merz Injectables, and founder of ARTÉ by Dr. M. All treatments at ARTÉ are performed personally by Dr. Michelle or Dr. Alfred who is personally trained by Dr. Michelle.
Disclaimer: Individual results vary. All treatments carry potential risks and side effects. A consultation with a qualified medical professional is recommended before undergoing any aesthetic procedure.
