Nitrous Oxide is affectionaly known as "laughing gas". It is used to alleviate anxiety during your dental visit. It is administered through a face mask. You will breathe Oxygen combined with the Nitrous Oxide gas. You never lose consciousness and are never "out of control". Because nitrous oxide does not numb teeth, it is used in combination with routine dental anesthesia. However, after being placed on nitrous oxide for a few minutes, most of our dental patients don't feel the dental injections. It is a wonderful option if you're really worried about dental treatment.