A tooth key, also known as a dental key, in an instrument that was used in dentistry for centuries to extract teeth. Modeled after a door key, the dental key was used by inserting the instrument horizontally into the mouth until its "claw" tightened over a tooth. The instrument was rotated to loosen the tooth. This often resulted in the tooth breaking, causing jaw fractures and soft tissue damage. By the early nineteenth century, the introduction of forceps had rendered the tooth key obsolete. This tooth key is made of stainless steel and about 5" long.