Materials used for injection thyroplasty are
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
Collagen
Acellular micronized human dermis
Gelatin powder
All the above
Larynx