title: Study looks at laughing gas and dental patients.
mesh_terms: D016854:Dental Anxiety / Q000517:prevention & control*; D006212:Hallucinations / Q000139:chemically induced*; D006801:Humans; D006992:Hypnosis, Dental; D009609:Nitrous Oxide / Q000494:pharmacology*
chemical_list: D009609:Nitrous Oxide