<prompt> Materials used for injection thyroplasty areCollagenAcellular micronized human dermisGelatin powderAll the above  <response>: Injection of vocal cord with Teflon paste or gelfoam to augment and medialize the paralyzed cord so that the opposite healthy cord can easily approximate Ref: PL Dhingra Textbook of Ear, Nose and Throat, Edition 6, page - 301 