This kind of sedation uses a mixture of nitrous oxide and oxygen ("laughing gas") to sedate you and has been used in dentistry and other medical settings for many decades. When seated in the treatment area, the dentist places a small mask over your nose to deliver the gas mixture. When your treatment is completed, the nitrous oxide is turned off and you will be given pure oxygen until you feel completely normal. When the effects of the nitrous oxide have completely worn off, you will feel fully awake and alert and will probably remember very little about your dental experience. You will be able to drive yourself home and do anything else you would do during a normal day.