Nitrous oxide (“laughing gas”) sedation

Nitrous oxide sedation is the most frequent form of sedation used in dentistry, used for over 150 years with proven safety record. It is best suited for mild or moderate dental anxiety significantly reducing fear or apprehension, and providing a state of relaxation.

Under nitrous oxide you remain conscious (awake) and able to breathe on your own, with a sense of total well-being, euphoria or floating. It also produces a pain-relieving effect, however, it varies a lot from person to person and can’t be relied upon. It means that a local anesthetic will still have to be given to ensure your comfort. Nitrous oxide will put you at ease so you experience no discomfort during the injection, and a little memory of the procedure. In addition, it may also help to minimize severe gagging during dental treatment.

There are very few contraindications for the procedure. Women in their first trimester of pregnancy, patients with emphysema, those under anti-cancer therapy with bleomycin or those who have recently undergone ear or eye surgery should avoid nitrous. If you are either congested, have a cold/flu or cannot breathe through the nose, your appointment may require postponing.

Nitrous oxide and oxygen gases are stored in canisters and delivered to patients via a tube and small mask placed over the nose. To young children requiring nitrous sedation, the mask will be provided in advance for familiarization.

After the procedure there’s no “hangover” effect – the gas is eliminated from the body within 3 to 5 minutes after the gas supply is stopped. You can safely drive home and don’t need an escort. You can return to normal activities immediately.