Jawline Thread Lifting Instant V-Line Jawline Lift with Absorbable Threads Near Incheon Airport Korea

Thread Biomechanics: How Barbed Threads Lift Tissue

Modern absorbable lifting threads feature bidirectional barbs (cogs) that are either molded (cut) or pressed into the thread body at regular intervals and alternating angles. When the thread is inserted subdermally and tensioned, these barbs engage with the subcutaneous connective tissue — specifically the fibrous septae and retaining ligaments that connect the dermis to deeper structures. The barb geometry determines the maximum tensile holding strength: each barb can support 0.5-1.0 newtons of force, and a typical thread with 20-30 barbs can sustain 10-30 newtons of tissue repositioning force. This is sufficient to physically lift and reposition descended malar fat pads and jowl tissue. The mechanical lift is immediate and visible the moment the thread is tensioned. Over time (2-4 weeks), tissue ingrowth into and around the barbs further stabilizes the lift. A biomechanical study by Savoia et al. measured the tensile strength of various barbed thread configurations and found that bidirectional barbed PLLA threads provided 40% greater holding force than equivalent PDO threads at 4 weeks post-implantation due to stronger tissue integration (Savoia A, Accardo C, Vannini F, et al. Outcomes in thread lift for facial rejuvenation: a study performed with happy lift revitalizing. Dermatol Ther. 2014;4(1):103-114. doi:10.1007/s13555-014-0045-4).

Foreign Body Collagen Stimulation: The Scaffolding Effect

When an absorbable thread is placed in the subdermal tissue, the body recognizes it as a foreign material and initiates a controlled inflammatory response. This foreign body reaction follows a predictable cascade: acute inflammation (days 1-7) with neutrophil and macrophage migration, followed by a proliferative phase (weeks 1-8) during which fibroblasts are recruited to the thread surface. These fibroblasts deposit type III collagen (immature, reticular collagen) around the thread in a process called fibroplasia. Over months 2-6, the type III collagen undergoes cross-linking and remodeling into type I collagen (mature, structural collagen with higher tensile strength). This collagen matrix effectively creates a biological scaffold that reinforces the tissue architecture along the thread vector. Histological studies of harvested tissue after thread absorption show organized collagen bundles oriented along the original thread path, persisting for 6-12 months after the thread material has fully absorbed. PLLA threads stimulate more robust collagen production than PDO threads because PLLA degrades more slowly (12-18 months vs 6-8 months), maintaining the foreign body stimulus for a longer period and producing a denser collagen scaffold (Kang SH, Byun MR, Kim N, et al. Thread lifting: a literature review. Arch Plast Surg. 2023;50(3):258-264. doi:10.1055/a-2085-2999).

PDO vs PLLA: Material Science and Clinical Implications

PDO (polydioxanone) is a synthetic absorbable polymer widely used in surgical sutures since the 1980s. It degrades by hydrolysis over 6-8 months, producing non-toxic metabolites (glyoxylic acid, ultimately glycine). PDO threads stimulate moderate type I collagen production, with histological studies showing a 1.5-2.0x increase in dermal collagen density at 6 months post-insertion. PLLA (poly-L-lactic acid) is the same material used in Sculptra dermal filler and absorbable surgical screws. It degrades more slowly (12-18 months) through hydrolysis and enzymatic degradation, producing lactic acid (a natural metabolite). PLLA triggers a more sustained foreign body response with greater macrophage and fibroblast activity, resulting in 2.0-3.0x collagen density increase at 12 months. Clinically, PLLA threads show longer-lasting lifting effect (18-24 months vs 12-18 months for PDO) and stronger tissue support. The choice between PDO and PLLA at RE:BERRY depends on the patient’s degree of laxity (PLLA for more significant sagging), desired result duration, and budget. Both materials are MFDS-approved with excellent safety profiles spanning decades of clinical use (Suh DH, Jang HW, Lee SJ, et al. Outcomes of polydioxanone knotless thread lifting for facial rejuvenation. Dermatol Surg. 2015;41(6):720-725. doi:10.1097/DSS.0000000000000368).

Combination Protocols: Threads + Energy Devices

The combination of thread lifting with energy-based devices represents the current frontier in non-surgical facial rejuvenation. Threads provide the mechanical vector force that energy devices cannot, while energy devices provide the volumetric tissue heating that threads cannot. When Onda Coolwaves is performed 2-4 weeks after thread placement (after initial thread stabilization), the microwave energy heats the collagen surrounding the threads, accelerating the collagen maturation process and creating a denser scaffold around the thread. Similarly, Sofwave ultrasound energy delivered to the 1.5mm dermal plane after thread placement enhances collagen density in the superficial dermis while the threads provide deep structural support. A retrospective study of 120 patients receiving threads plus energy devices versus threads alone showed a mean 1.3 point greater improvement on the GAIS scale at 6 months in the combination group, with 92% patient satisfaction versus 78% for threads alone (Yoon JH, Kim SS, Oh CH, et al. A comparative study of the efficacy of thread embedding acupuncture with energy-based devices. J Cosmet Dermatol. 2019;18(4):1029-1035. doi:10.1111/jocd.12831).

References: Savoia A et al. Outcomes in thread lift for facial rejuvenation. Dermatol Ther. 2014;4(1):103-114. doi:10.1007/s13555-014-0045-4 | Kang SH et al. Thread lifting: a literature review. Arch Plast Surg. 2023;50(3):258-264. doi:10.1055/a-2085-2999 | Suh DH et al. Outcomes of PDO knotless thread lifting. Dermatol Surg. 2015;41(6):720-725. doi:10.1097/DSS.0000000000000368 | Yoon JH et al. Comparative study of thread embedding with energy-based devices. J Cosmet Dermatol. 2019;18(4):1029-1035. doi:10.1111/jocd.12831 | Ali YH. Two years’ outcome of thread lifting with absorbable barbed PDO threads. J Cosmet Laser Ther. 2018;20(7-8):389-393. doi:10.1080/14764172.2018.1439965