They are hypodermic needles preloaded with an absorbable PDO suture.
PDO stands for Polydioxanone. Its a synthetic absorbable surgical suture composed of polydioxanone. Sutures are used to perform Cardiothoracic surgery (such as open-heart surgery). It's one of the safest materials to be implanted in the body. Your skin fully absorbs it within 4 to 6 months & won't leave you with any scar tissue.
There are two methods, through which it’s working can be elaborated:
1) Controlled Healing:
In medical terms “Selective Inflammatory Response”, it is the principle behind a lot of aesthetic procedures (such as Fractional Laser, Chemical Peels & Microneedling). Our skin is very good at repairing itself, and by inserting PDO threads we make it ‘heal’ itself by creating new collagen, naturally!
Your skin gently reacts to the inserted threads
Yes, PDO is fully absorbable, but that doesn’t mean your skin won’t react to it. During the 4 to 6 months needed to fully absorb the PDO suture, your skin is also repairing itself around it. It’s “controlled healing” happening underneath the skin!
2) Mesh or Lift:
There are two types of procedures with PDO Threads:
A beautiful and healthy face has a 'V-shape'. With the ageing of tissues and the action of gravity, this "V-shape" diminishes or inverts. The idea behind the Nu-Mesh and the Nu-Lift technique is to either create a scaffolding in order to support the tissues and keep them in the "V-shape" or where necessary to delicately lift the tissues and re-position the skin to recreate the "V-shape" where it's been lost.
Although threads can be inserted almost anywhere, one area where they are especially effective is the neck and jawline. The lower third of the face is challenging to treat effectively with botulinum toxin or injectable fillers, which are most effective in the upper and middle third of the face, respectively.