The goal of Sedation Dentistry is to be calm and relaxed. Nitrous Oxide, ie “Laughing Gas,” is administered through a breathing mask where the child is simply asked to take a few deep breaths. As they do so, they will feel the effects in just a few minutes. They may feel light-headed, a little tingly, and sometimes their arms and legs feel heavy and hard to move. This is simply the results of deep relaxation giving them a calm and comfortable experience.