Nitrous oxide analgesia and children's perception of pain.
D000766:Anesthesia, Dental; D002648:Child; D002675:Child, Preschool; D003793:Dental Restoration, Permanent; D004311:Double-Blind Method; D006801:Humans; D009609:Nitrous Oxide / Q000494:pharmacology; D010100:Oxygen; D010146:Pain / Q000503:physiopathology*; D012684:Sensory Thresholds / Q000187:drug effects; D013997:Time Factors
D009609:Nitrous Oxide; D010100:Oxygen