Sedation dentistry is used when a patient is anxious or nervous about a dental procedure. There are a variety of methods to produce an effect of sedation dentistry. Mild sedation which may involve guided self-administered inhalation and tablets. There are more marked sedation methods which include nitrous oxide (traditionally known as laughing gas) and sleep dentistry which is administered by a trained specialist in the dental chair. Sometimes, we recommend general anaesthetic and hospitalisation for some forms of treatment (i.e. complicated extraction of wisdom teeth and or other surgical procedures).