title: Modifying nitrous oxide analgesia circuits to reduce pollution in the dental operatory.
mesh_terms: D000766:Anesthesia, Dental / Q000295:instrumentation*; D003762:Dental Instruments; D003770:Dental Offices; D004787:Environmental Pollution / Q000517:prevention & control*; D006801:Humans; D009609:Nitrous Oxide; D009784:Occupational Diseases / Q000139:chemically induced / Q000517:prevention & control
chemical_list: D009609:Nitrous Oxide