Modification of nasal cannulas for efficient relative analgesia.
D000698:Analgesia; D000766:Anesthesia, Dental / Q000295:instrumentation*; D000769:Anesthesia, Inhalation / Q000295:instrumentation*; D006801:Humans; D009609:Nitrous Oxide / Q000008:administration & dosage*
D009609:Nitrous Oxide