Official websites use .gov A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Caricature: Interior of a dentist's office, a patient is seated in a chair and the dentist is attempting to extract a tooth. The dental assistant is behind the chair holding the patient down.
Copyright:
The National Library of Medicine believes this item to be in the public domain. (More information)