Ultherapy Prime in Korea is the upgraded Merz Aesthetics version of Ultherapy, and the change sits in the imaging guidance rather than in the energy itself. Both machines heat tiny points with focused ultrasound (HIFU) at 1.5, 3.0 and 4.5 mm, the deepest row landing in the SMAS. Prime adds more precise on-screen ultrasound imaging, which the maker presents as aiming at that layer more accurately and comfortably. A face takes roughly 30 to 60 minutes, the deep lines still sting, swelling can follow, and firming builds over months. Prime is a refinement, not a different procedure.
Merz Aesthetics · Ultherapy PrimeGuide
Which parts of the device Merz actually revised
The revision is about seeing and aiming. Prime pairs its transducers with a more precise ultrasound image, so the operator can check skin, fat and the SMAS before each row of energy goes in. Merz describes it as an upgrade of the original Ulthera unit that targets the SMAS more precisely.
The physics is unchanged: focused ultrasound still makes the thermal points, with no radiofrequency or laser added. In practice, line placement can follow the image more closely where layers sit at varied depths.
Guide
What a Prime session shares with the older unit
Depths, indications and the session plan carry over. Treatment rows still sit at 1.5 mm for the upper skin, 3.0 mm for the deeper dermis and 4.5 mm for the SMAS. Targets remain the jawline, under the chin, the lower face and the neck.
The day itself looks familiar: a face assessment, numbing cream on the skin, the passes, then cooling. Most people resume normal plans the same day with some redness, and the lift develops as new collagen forms.
Guide
Studies behind visualized ultrasound lifting
The research covers focused ultrasound lifting in general, not the Prime model alone. In a 2014 study in Medical Lasers, Kim and colleagues treated twenty Korean volunteers with a 4.5 mm probe followed by a 3.0 mm probe; blinded raters judged 16 of the 17 evaluated subjects improved at three months.
A 2024 randomized, investigator-blinded trial by Wood and colleagues in the Journal of Drugs in Dermatology gave 51 people a single session of microfocused ultrasound with visualization on the lower face and neck. Both a standard line pattern and a pattern customized to each person's anatomy improved jawline laxity by more than one point, and the authors noted the custom approach helped faces with anatomical variation. Matching lines to the image is the idea Prime is built around.
Guide
Side effects that the upgrade does not remove
Sharper imaging does not remove discomfort or risk. Expect the deeper 4.5 mm lines to feel like hot, prickling jolts, especially along the jaw, even after numbing cream.
- Common: redness, puffiness and tenderness for hours to a few days.
- Occasional: small bruises or raised welts along the treatment lines.
- Uncommon: temporary nerve irritation with numbness or tingling along the jaw, usually settling over weeks.
- Rare: surface burns or marks when energy is placed too shallow or lines overlap.
- Limit: heavy sagging or loose neck skin may need surgery rather than ultrasound.
Guide
Original or Prime: a side-by-side for patients in Seoul
Ultherapy Prime in Seoul and the original unit differ on a few qualitative points only.
| Point | Original Ultherapy | Ultherapy Prime |
|---|---|---|
| Energy | Focused ultrasound (HIFU) | Focused ultrasound (HIFU) |
| Depths | 1.5, 3.0 and 4.5 mm | 1.5, 3.0 and 4.5 mm |
| Imaging | Ultrasound image on screen | More precise image guidance, per the maker |
| Main target | SMAS and deep dermis | SMAS, aimed more precisely |
| Sensation | Sharp heat on deep lines, numbing used | Comfort improvements cited by maker; still felt |
| Recovery | Same-day return, temporary swelling | Same-day return, temporary swelling |
Evidence
Research behind this page
- Clinical Effectiveness of a High-Intensity Focused Ultrasound in Skin LiftingMedical Lasers · 2014 · doi:10.25289/ml.2014.3.2.55
In twenty Korean volunteers treated with 4.5 mm and 3.0 mm focused ultrasound probes, blinded raters found improvement in 16 of 17 evaluated subjects at three months.
- Comparing the Safety and Effectiveness of Microfocused Ultrasound: Standard vs Targeted Tissue Protocol in Lifting and Tightening the Lower Face and Upper NeckJournal of Drugs in Dermatology · 2024 · doi:10.36849/jdd.7647
A randomized, investigator-blinded trial in 51 subjects found that both standard and anatomy-customized microfocused ultrasound protocols lifted and tightened the lower face and neck.
FAQ
Questions about Ultherapy in Gangnam
I had the original Ultherapy before; should my next session be on Prime?
It can be, but the decision rests on your face today, not on the model number. Prime uses the same ultrasound depths, so a doctor can plan it much like your earlier session while using its imaging to place lines. Bring the date and areas of your previous treatment. If the last session was recent and the collagen response is still developing, waiting is usually the sensible choice.
Does Ultherapy Prime in Seoul still need numbing cream?
Yes, clinics in Seoul still apply numbing cream before Prime, because the deep lines remain uncomfortable. The maker cites comfort improvements, yet most people feel heat and prickling on the jaw and near bony areas. Tell the doctor early if a line feels too strong, since energy and pacing can be adjusted during the pass, and sensitive zones near bone can be given lower settings.
Can a thin face with little fat be treated with Prime?
Often yes, though a thin face needs careful depth choices and a doctor willing to skip some zones. With little fat over the bone, deep energy near the temples or jaw angle can feel harsher and raise the risk of nerve irritation. The imaging helps show how close the layers sit to the bone. Ask whether hollow areas get fewer deep lines.
Is the neck treated with the same transducers as the face?
The neck is usually treated with shallower settings than the jawline, while using the same family of transducers. The skin there is thinner and sits over important structures, so doctors tend to favor the 3.0 mm and 1.5 mm depths and use the deepest one with care. Ask the doctor to mark the neck lines separately on your treatment plan.
Can I wear makeup and exercise after a Prime session?
Light makeup is usually fine the next day, while hard exercise should wait a day or two. Heat and heavy sweating can make swelling and tenderness last longer. Skip saunas, hot baths and strong exfoliating products for the first several days. Use a gentle cleanser and sunscreen. Contact the clinic if you notice numbness, blistering or a mark that does not fade.
Is a long-haul flight the day after Ultherapy Prime a problem?
For most people, flying the next day is fine because there are no wounds or stitches to protect. Cabin air is dry, so moisturize well, drink water and expect any puffiness to linger a little longer. Carry the written aftercare sheet in case tingling appears after landing. If you bruise easily, an extra day before the flight gives time to check the skin.
How long do the effects of a Prime session tend to last?
The duration varies from person to person and depends on age, skin quality and ongoing aging. The firming comes from collagen remodeling that develops over months, and the 2014 Medical Lasers study by Kim and colleagues measured improvement at three months. Many patients plan a check-up rather than a fixed repeat date. Sun exposure, smoking and weight change also affect how long it holds.