Dualsonic HIFU in Korea From Jawline to Chest

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The lower face usually shows laxity: an uneven jaw border, marionette lines and softness under the chin. The neck tends to show horizontal lines and thin skin; the chest shows crepey creases. Focused ultrasound treats all three with heat points under intact skin, but depth and line density change by zone.

Established point-focus systems reach the SMAS at 4.5 mm and the dermis at 3.0 and 1.5 mm. Thinner skin on the neck and chest generally calls for the shallower settings. The device name on a menu does not tell you its cartridge depths, so ask for them in writing.

Yalici-Armagan and Elcin, writing in Dermatologic Therapy in 2020, looked back at 24 people who had one session with a newer microfocused ultrasound device for lower-face laxity. Two blinded investigators compared photographs taken a median of 4.3 months later, scoring the jawline, marionette area and under-chin.

In that review, the investigators rated 20.9% of subjects as improved and 62.5% as unchanged, while 45.9% of subjects rated themselves improved; no serious side effects were seen. The authors suggest that photographs may miss what people feel in their own skin. The paper does not name Dualsonic, but it is a useful reminder that a newer device deserves modest expectations until its own data grow.

Casabona and Nogueira Teixeira, writing in the Journal of Cosmetic Dermatology in 2017, reviewed 47 people treated on the neck, the chest or both. Each had microfocused ultrasound with visualization using the shallower 7 and 10 MHz transducers, followed in the same session by calcium hydroxylapatite diluted one to one with lidocaine and injected just below the skin.

In that study, two blinded evaluators scored photographs at 90 days, and the mean neck line score fell from 2.6 to 1.3. Chest scores moved from the moderate-to-severe range into the mild range on two wrinkle scales. The device was Ultherapy and the effect came from the pairing, so it does not predict what ultrasound alone, or another device, would do.

The neck and chest change slowly, and early swelling can feel like tightening. Collagen remodeling continues for months, which usually means the useful comparison happens at home rather than in Seoul.

Take photos before treatment in daylight, with the chin level and shoulders relaxed: front and both sides of the jaw, the neck, and the upper chest without lotion. Repeat them in the same pose and light after about three months, because a tilted head changes how neck lines look.

Pregnancy, an active skin problem on the area, a metal implant in the zone, or recent filler or threads in the neck are reasons to wait or adjust the plan. Doctors usually avoid the front of the throat. Very loose neck skin or heavy banding is more likely to need surgery.

Common effects are redness, mild swelling and tenderness for a few days; bruising and temporary numbness are less frequent. Results vary from person to person.