When operative pain was conquered.
D000766:Anesthesia, Dental / Q000266:history*; D000769:Anesthesia, Inhalation / Q000266:history*; D004987:Ethers / Q000266:history*; D006666:History of Medicine; D006801:Humans; D007573:Jaw Neoplasms / Q000601:surgery; D014481:United States
D004987:Ethers