Favorable Crisscrossing Pattern With Polydioxanone: Barbed Thread Lifting in Constructing Fibrous Architecture

Area of Science:

• Aesthetic Medicine
• Dermatology
• Biomaterials Science

Background:

• The longevity of polydioxanone (PDO)-barbed lifting threads is a subject of ongoing debate.
• Current techniques may not fully optimize the tissue response for sustained lifting effects.

Purpose of the Study:

• To evaluate the efficacy of a crisscross implantation pattern in extending the longevity of PDO-barbed thread lifts.
• To compare the fibrotic response between crisscross and conventional fan-shaped PDO thread implantation.

Main Methods:

• A nude mouse model was used to compare fan-shaped (control) and crisscross (experimental) PDO thread implantation patterns.
• Histological analysis using H&E, Masson's Trichrome, and Sirius red staining was performed on harvested tissue.
• Quantification of fibrotic area width and density around the threads was conducted.

Main Results:

• Fibrous capsulations were threefold greater around barbed areas compared to barb-free areas of PDO threads.
• The crisscross pattern resulted in fivefold greater width and density of fibrotic areas compared to the fan-shaped pattern.
• Crisscross implantation markedly condensed fibrous capsule induction around PDO threads.

Conclusions:

• The study supports a shift towards architectural implantation patterns for PDO-barbed threads.
• Crisscross patterns can enhance fibrogenesis, reduce thread tension, and potentially prolong the results of facial rejuvenation.
• This provides a basis for optimizing PDO thread lifting techniques.