Some children are given nitrous oxide/oxygen, or laughing gas, to relax them for their dental treatment. Nitrous oxide/oxygen is a blend of two gases, oxygen and nitrous oxide. Nitrous oxide/oxygen is given through a small breathing mask, which is placed over the child’s nose to allow relaxation without putting them to sleep. The American Academy of Pediatric Dentistry recognizes this technique as a safe, effective method to use while treating children’s dental needs. The gas is mild and easily administered. With normal breathing, it is then quickly eliminated from the body. It is non-addictive. While inhaling nitrous oxide/oxygen, your child remains fully conscious.