Nitrous Oxide

Nitrous Oxide, known to many as laughing gas, is the most commonly used form of sedation in dentistry.

How does nitrous oxide work?Sedation Dentistry

Nitrous oxide (N2O) is a gas which you can breathe. It is colorless, odorless and doesn’t irritate. It is mixed with Oxygen in a device called a regulator to achieve proper concentration.

Nitrous oxide simply helps reduce pain and it gives you a pleasurable, tingly feeling. After breathing the gas for about 5 minutes you will feel a light headed sensation that will spread to your entire body. It feels like a getting a buzz after a few drinks. Some people will react to the light headedness by giggling or laughing. Thus the term laughing gas.

N2O suppress almost all forms of sensation – especially hearing, touch and pain. The ability to concentrate or perform intelligent acts is only minimally affected, as is memory.

How is nitrous oxide administered?

Nitrous oxide is delivered via a hose from the source to a nitrous oxide mask that fits over your nose. The nitrous mask serves two functions. One to deliver the gas and the other is remove excess gas so your dentist won’t breathe it.

All you have to do is breath thru your nose to inhale the gas. The gases are mixed by a device called a regulator shown here.


Advantages of Nitrous Oxide

  • Nitrous oxide works quickly – it arrives in the brain in about 20 seconds and the effects of the gas begin within 2 to 3 minutes.
  • The degree of sedation can be adjusted easily for achieving the proper effect.
  • The effects of the gas are eliminated from your system within 5 minutes. You will be able to safely drive home or back to work
  • Nitrous oxide sedation is very safe. There are very few know side effects and the gas used has no ill effects on the heart, lungs, liver, kidneys, or brain.

Disadvantages of Nitrous Oxide

  • Some individuals may feel nauseated with the gas or uncomfortable with the way it makes them feel
  • Some people may not achieve acceptable levels of sedation with gas alone
  • If your nose is stopped up or if you have trouble breathing through your nose you will not be able to breathe in adequate amounts of nitrous oxide and oxygen

Are there any contraindications?

The main contraindications are few. They include MS and emphysema. Nitrous oxide is not indicated for pregnant patients.

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