PDO Scalp Threading?

The treatment itself is relatively quick and painless, with no downtime and very little recovery. A local anesthetic is used for patient comfort .Very fine, hollow needles (think acupuncture) are inserted under the scalp, leaving behind a nearly microscopic thread which will create a foreign body response, triggering the bodies’ own natural healing mechanism. Threads dissolve naturally, absorbed by the body over the course of 4-6 months. This process of forced cellular activity will promote new tissue growth, improve circulation and ultimately help to regenerate the hair follicle.

PDO scalp threading is new to me. I want to see some published articles on it and its benefits and liabilities. I would not recommend it until I see some good published data.  It actually makes no sense to me because putting a foreign body in the scalp can only produce down sides that I can only imagine