There are various types of yarn that are deeply placed on the skin or the subcutaneous tissue of the face and body to cause skin to stretch.Some of them have spikes, cones, etc., are bruised on the skin and hang it up in a higher position.
They are absorbable by the body and their activity lasts 1-2 years, depending on their type.
There are PDO threads made of polydioxanone. The body, in its attempt to absorb them, mobilizes its mechanisms and stimulates fibroblasts to produce collagen and elastin. In addition, COGs -PDO mechanically mount the skin. Similarly, polylactic acid threads, such as Silhouette Soft, offer direct mechanical suspension of the skin and promote the production of collagen and elastin during absorption. Their effect lasts about two years, is of American origin, FDA approved.
Better results are recorded by the combination of yarn placement and radio frequency treatment.