A combination of nitrous oxide and oxygen is breathed through a nasal mask to give a sensation of relaxation and euphoria. Patients may also know this as "laughing gas". The gas is odorless. It takes about three minutes to achieve a comfortable state.

The patient is totally aware during this procedure and can direct the doctor, if they feel any discomfort. Nitrous oxide is completely eliminated from the patients' system within a few minutes after the procedure, so that you are able to drive.

This is a significant help for relieving mild to moderate anxiety and it helps eliminate the gag reflex. Nitrous oxide oxygen can be used for children and often eliminates the need for a local anesthetic (needle) or numbing. This can be a big help for positive management of younger patients.