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Objectives: The author showcases aesthetic outcomes of different types of absorbable threads (Silhouette Soft, Definisse, Aptos) in order to find the best algorithm of thread selection.

Introduction: Thread lifting with absorbable threads gained a strong reputation over the last 10 years. The success of these technologies is due to the constant research and innovation in order to provide less invasive treatments. The most popular absorbable threads with recognized effect on tissue lifting are Silhouette Soft, Definisse and Aptos absorbable threads. They provide a long lasting biorevitalization asl well. The author tries to find a correct algorithm in different threads selection building on personal experience.

Materials / method: The author describes three types of absorbable threads (Silhouette Soft, Definisse and Aptos) with showcases from personal clinical experience. The different composition and structure of the threads determine the choice of the product to meet the patient's expectations.

Results: The correct selection of the thread is the crucial ingredient in order to obtain the best outcome and the patient's satisfaction. The knowledge of thread composition and structure is the basis of the right choice.

Conclusion: Absorbable threads have a meritoriously good reputation in tissue reposition and long lasting biostimulation. Good knowledge of different thread types helps the aesthetic practitioner to offer a suitable tailor-made solution for every patient.

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Objectives: By understanding the changes after insertion of the PDO thread into the tissue, we can understand the theory of the thread lifting.
and It is possible to infer how different types of thread can make give lifting effects.

Introduction: Clinicians know empirically that absorbable thread insertion makes some positive result to human face.
it is not well known what principles lead to such a positive change.
In particular, experiments using small animals were difficult to observe precise changes because tissue structures are different from human.
Experiments were carried out using PIG, which is the most similar to human, and time-dependent changes were further observed through 1-year observation.

Materials / method: four White Yucatan Pigs were selected for study of histologic changes after the insertion of the absorbable threads.
we inserted mono-thread and cog thread to the pig.
and we checked histologic changes at 4 weeks, 12 weeks, 24 weeks, 12months.

Results: tissues change results are summarized 5 categories
1. newly developed fibrous connective tissue
2. Merging with existing fibrous connective tissue
3. Tissue contraction by myofibroblast activity
4. increased capillary vessel size
5. reduced fat layer thickness by fat cell denaturation

Conclusion: The injection of PDO into tissues causes specific changes in the surrounding tissues in addition to the physical effect. theses changes can be organized into 5 categories. the result of this study can explain all the positive changes that have been reported in previous clinical research studies.

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这项工作的完成感谢以下机构的支持： N-finders company for cost of animal study

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