title: Nitrous oxide-oxygen analgesia; indications for use and technic of induction.
mesh_terms: D000698:Analgesia; D006801:Humans; D009055:Mouth / Q000601:surgery*; D009609:Nitrous Oxide; D010100:Oxygen; D010146:Pain; D059408:Pain Management
chemical_list: D009609:Nitrous Oxide; D010100:Oxygen
keywords: MOUTH/surgery