Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, promoting...

https://mylesxbqi254.trexgame.net/are-thread-lifts-more-predictable-than-energy-based-devices

Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, promoting gradual lifting over 3 to 6 months. Compared to RF, which heats skin to 40-45°C for collagen boost, Ultherapy reaches deeper layers