injection into vocal cords to correct paralysis
Cymetra Injection to Paralyzed Vocal Cord In the Clinic Technical Points for Percutaneous Injection. Transcutaneous (percutaneous transcricothyroid membrane) Injection Laryngoplasty for Vocal Cord Paralysis (room set-up, equipment, video) Percutaneous collagen injection to left vocal cord (video only)
The second is injection laryngoplasty, which consists of of injecting the true vocal cord with gel-foam or with a variety of permanent substances. Teflon was used in the past but fell into disfavor because of tissue compatibility problems.