title: A letter from America.
authors.forename: David
authors.initials: D
authors.lastname: Witherspoon
mesh_terms: D006801:Humans; D012387:Root Canal Filling Materials / Q000737:chemistry; D012388:Root Canal Irrigants / Q000737:chemistry*; D012389:Root Canal Obturation / Q000379:methods*; D014481:United States
chemical_list: D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants