What Does Laughing Gas Do To A Dental Patient?

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Most dental visits are fairly standard. A dental hygienist will scrape plaque off your teeth, followed by polishing to remove any stains. After that, there's a round of flossing, a peek under the tongue, and your dentist gives your teeth a thumbs-up. You book your next appointment and mark another six months on your calendar.

But not every visit runs so smoothly. Some procedures require laughing gas to be administered. You've probably heard of it, but what does laughing gas do exactly, you may wonder?

What Is Laughing Gas?

Nitrous oxide (N2O), more commonly referred to as laughing gas, is used as a local sedation method, says the California Dental Association (CDA). It is colourless and odourless. Nitrous oxide is an effective sedative as it helps patients relax by inducing pleasurable feelings. Nitrous oxide is especially useful as it acts quickly and has a reversible effect. For those and other reasons, nitrous oxide is widely considered to be a safe method of sedation.

Side Effects

The CDA reports that only a minority of patients experience negative side effects, which can occur if the nitrous level is too high or if the amount inhaled quickly changes. Consult with your dentist to determine the best sedative to be used during a dental visit.

Once the nitrous oxide has been turned off, a patient needs to receive oxygen for at least five minutes to prevent a headache. The oxygen purges any remaining gas from the lungs while helping the patient to become alert and awake.

Meals are also a point of consideration when receiving nitrous oxide. Try to eat lightly prior to your dental visit and avoid a big meal for three hours afterwards. Also, ask your dentist how long after the procedure it is safe for you to drive.

Nitrous Oxide for Children

Not only is it safe for children, but laughing gas is a preferred sedation method for children who are nervous or anxious about a pending dental visit. Consult your child's dentist ahead of time to discuss and determine the appropriate sedation method.

Contraindications for Nitrous Oxide

While it's an effective sedative and easy to administer, nitrous oxide may not be the right choice for you, notes the American Academy of Pediatric Dentistry. You should notify your dentist if you have any medical or health conditions, of any medication you are taking, and if you have a history of emotional and/or drug addiction.

Chances are, at some point, you'll undergo a procedure that requires laughing gas. To avoid such a procedure, practising good oral hygiene is key. 

This article is intended to promote understanding of and knowledge about general oral health topics. It is not intended to be a substitute for professional advice, diagnosis or treatment. Always seek the advice of your dentist or other qualified healthcare provider with any questions you may have regarding a medical condition or treatment.

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  2. Injection – Next, your dentist will slowly inject the local anesthetic into the gum tissue. Most people don't feel the needle. Instead, the sting they feel is caused by the anesthetic moving into the tissue.

  3. After effects – An injection of local anesthesia can last up to several hours. After you leave the dentist's office, you may find it difficult to speak clearly and eat or drink. Be careful not to bite down on the area that is numbed. You could cause damage to yourself without realizing it.