Plastic Surgery researchers study human tissue, new kinds of bandages to improve the treatment injuries and help wounds heal without scars. Reconstructive surgery is, in its broadest sense, the use of surgery to restore the form and function of the body, although maxillo-facial surgeons, plastic surgeons and otolaryngologists do reconstructive surgery on faces after trauma and to reconstruct the head and neck after cancer. Reconstructive plastic surgeons use the concept of a reconstructive ladder to manage increasingly complex wounds.