Dental anaesthesia; nitrous oxide and oxygen.
D000698:Analgesia; D000758:Anesthesia; D000760:Anesthesia and Analgesia; D000766:Anesthesia, Dental; D000776:Anesthesiology; D003814:Dentistry, Operative; D009609:Nitrous Oxide; D010100:Oxygen
D009609:Nitrous Oxide; D010100:Oxygen
DENTISTRY, OPERATIVE/anesthesia and analgesia; NITROUS OXIDE/anesthesia and analgesia