The PDO thread lift procedure itself involves the implantation of fine, absorbable polydioxanone threads, similar to those which are used in medical suturing, into the subcutaneous layer of the skin using tiny needles. Their placement causes a series of microinjuries that trigger the body to produce greater amounts of natural collagen and elastin in order to repair the microscopic damage that occurs. The threads remain in place for around 6 to 8 months, after which time they are absorbed into the body, leaving new collagen in their place.