title: The efficacy of dihydrocodeine in postoperative dental pain.
mesh_terms: D003061:Codeine / Q000031:analogs & derivatives*; D006801:Humans; D006853:Hydrocodone / Q000627:therapeutic use*; D010149:Postoperative Pain / Q000188:drug therapy*; D014095:Tooth, Impacted / Q000601:surgery*
chemical_list: D006853:Hydrocodone; D003061:Codeine