Injection Laryngoplasty for Unilateral Vocal Fold Paralysis

Following the use of paraffin injection by Brunings in 1911, various materials, such as Vaseline and Teflon liquid silicone, have been used for injection laryngoplasty. In Japan, atelocollagen, hyaluronic acid, autologous fat, and calcium phosphate cement (CPC) have recently been used as injection materials. Each material has some limitations, including the risk of induction of foreign body reaction, formation of granulation tissue, risk of infection, and need for harvesting autologous tissue. In this article, we provide a general review of injection laryngoplasty and our novel technique of videolaryngoscopic injection laryngoplasty using CPC.