Sedation enables the dentist to perform a procedure on the patient in an effective way.
The specialist can do their job while the person receiving treatment is comfortable and in no pain.
Another reason for using sedation is for people who suffer from odontophobia, or fear of the dentist. This type of people experience high levels of stress and anxiety, their muscle become tense and they may even suffer from hypersensitivity to the choking reflex. This may be due to a direct negative learning experience and can be solved with some types of sedation.