Variation of the Thread Thickness After Thread Lifting: An Ultrasonographic Evaluation.

[BACKGROUND] Thread lifting for the management of skin sagging is a well-established method of noninvasive facial rejuvenation; however, the literature regarding follow-up with ultrasound imaging is sparse.

[AIMS] The aim of this study was to assess the long-term stability of nonabsorbable silicone threads by monitoring any changes in their thickness over time. Using ultrasound imaging, we tracked the threads' dimensional changes in patients to determine whether the threads maintain their structural integrity during the follow-up period.

[MATERIALS AND METHODS] A retrospective analysis was conducted on 51 patients who underwent thread lifting with silicone threads. Ultrasonography was used at follow-up points to assess various parameters. These included the visibility of the threads, any changes in their thickness over time, potential migration of the threads in relation to the cannula entry point, as well as variations in echogenicity, which could suggest alterations in the thread material or surrounding tissue, along with any associated complications.

[RESULTS] The patients who had their follow-up ultrasound done 6 months or less after the procedure had a lower mean thread thickness compared to those who were evaluated after 6 months. After 6 months, however, the thread thickness remains within a fixed range. The most common adverse effect was swelling. There was no migration in any of the patients.

[CONCLUSIONS] Thread lifting is a procedure with long-term durability. Ultrasound imaging can be utilized as a tool for follow-up.