Oxygen therapy: two.
D000891:Anti-Infective Agents, Local / Q000627:therapeutic use*; D000985:Antisepsis; D006801:Humans; D006861:Hydrogen Peroxide / Q000627:therapeutic use*; D010100:Oxygen / Q000627:therapeutic use*; D012390:Root Canal Therapy
D000891:Anti-Infective Agents, Local; D006861:Hydrogen Peroxide; D010100:Oxygen